diff --git a/core/includes/menu.inc b/core/includes/menu.inc
index be5171e..75295bf 100644
--- a/core/includes/menu.inc
+++ b/core/includes/menu.inc
@@ -349,7 +349,7 @@ function template_preprocess_menu_local_task(&$variables) {
 
   if (!empty($link['href'])) {
     // @todo - Remove this once all pages are converted to routes.
-    $variables['link']['#href'] = $link['href'];
+    $variables['link']['#path'] = $link['href'];
   }
   else {
     $variables['link'] += array(
@@ -396,7 +396,7 @@ function template_preprocess_menu_local_action(&$variables) {
   }
   else {
     // @todo - Remove this once all pages are converted to routes.
-    $variables['link']['#href'] = $link['href'];
+    $variables['link']['#path'] = $link['href'];
   }
 }
 
diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index f136ca1..993c4d9 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -992,7 +992,7 @@ function template_preprocess_links(&$variables) {
         '#type' => 'link',
         '#title' => $link['title'],
         '#options' => array_diff_key($link, array_combine($keys, $keys)),
-        '#href' => $link['href'],
+        '#path' => $link['href'],
         '#route_name' => $link['route_name'],
         '#route_parameters' => $link['route_parameters'],
         '#ajax' => $link['ajax'],
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/MailToFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/MailToFormatter.php
index 58f6c6b..d14db32 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/MailToFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/MailToFormatter.php
@@ -33,7 +33,7 @@ public function viewElements(FieldItemListInterface $items) {
       $elements[$delta] = array(
         '#type' => 'link',
         '#title' => $item->value,
-        '#href' => 'mailto:' . $item->value,
+        '#path' => 'mailto:' . $item->value,
       );
     }
 
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/UriLinkFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/UriLinkFormatter.php
index 762d5f3..c766f4e 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/UriLinkFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/UriLinkFormatter.php
@@ -32,7 +32,7 @@ public function viewElements(FieldItemListInterface $items) {
     foreach ($items as $delta => $item) {
       $elements[$delta] = array(
         '#type' => 'link',
-        '#href' => $item->value,
+        '#path' => $item->value,
         '#title' => $item->value,
       );
     }
diff --git a/core/lib/Drupal/Core/Form/ConfirmFormHelper.php b/core/lib/Drupal/Core/Form/ConfirmFormHelper.php
index de98053..f43728c 100644
--- a/core/lib/Drupal/Core/Form/ConfirmFormHelper.php
+++ b/core/lib/Drupal/Core/Form/ConfirmFormHelper.php
@@ -35,7 +35,7 @@ public static function buildCancelLink(ConfirmFormInterface $form, Request $requ
     if ($query->has('destination')) {
       $options = UrlHelper::parse($query->get('destination'));
       $link = array(
-        '#href' => $options['path'],
+        '#path' => $options['path'],
         '#options' => $options,
       );
     }
diff --git a/core/lib/Drupal/Core/Render/Element/Link.php b/core/lib/Drupal/Core/Render/Element/Link.php
index 474e9f5..33d3ebe 100644
--- a/core/lib/Drupal/Core/Render/Element/Link.php
+++ b/core/lib/Drupal/Core/Render/Element/Link.php
@@ -40,7 +40,7 @@ public function getInfo() {
    *     - #route_name and (optionally) a #route_parameters array; The route
    *       name and route parameters which will be passed into the link
    *       generator.
-   *     - #href: The system path or URL to pass as argument to _l().
+   *     - #path: The system path or URL to pass as argument to _l().
    *   - #options: (optional) An array of options to pass to _l() or the link
    *     generator.
    *
@@ -77,7 +77,7 @@ public static function preRenderLink($element) {
       }
       // If #ajax['path] was not specified, use the href as Ajax request URL.
       if (!isset($element['#ajax']['path'])) {
-        $element['#ajax']['path'] = $element['#href'];
+        $element['#ajax']['path'] = $element['#path'];
         $element['#ajax']['options'] = $element['#options'];
       }
       $element = static::preRenderAjaxForm($element);
@@ -89,7 +89,7 @@ public static function preRenderLink($element) {
     }
     else {
       // @todo Convert to \Drupal::l(): https://www.drupal.org/node/2347045.
-      $element['#markup'] = _l($element['#title'], $element['#href'], $element['#options']);
+      $element['#markup'] = _l($element['#title'], $element['#path'], $element['#options']);
     }
     return $element;
   }
diff --git a/core/lib/Drupal/Core/Render/Element/Table.php b/core/lib/Drupal/Core/Render/Element/Table.php
index d82fda8..7d4611e 100644
--- a/core/lib/Drupal/Core/Render/Element/Table.php
+++ b/core/lib/Drupal/Core/Render/Element/Table.php
@@ -281,7 +281,7 @@ public static function validateTable(&$element, FormStateInterface $form_state,
    *   $form['table'][$row]['edit'] = array(
    *     '#type' => 'link',
    *     '#title' => t('Edit'),
-   *     '#href' => 'thing/' . $row . '/edit',
+   *     '#path' => 'thing/' . $row . '/edit',
    *   );
    * }
    * @endcode
diff --git a/core/lib/Drupal/Core/Url.php b/core/lib/Drupal/Core/Url.php
index a6f0220..afbaf04 100644
--- a/core/lib/Drupal/Core/Url.php
+++ b/core/lib/Drupal/Core/Url.php
@@ -482,7 +482,7 @@ public function toArray() {
   public function toRenderArray() {
     if ($this->unrouted) {
       return array(
-        '#href' => $this->getUri(),
+        '#path' => $this->getUri(),
         '#options' => $this->getOptions(),
       );
     }
diff --git a/core/modules/aggregator/src/FeedViewBuilder.php b/core/modules/aggregator/src/FeedViewBuilder.php
index 26523ab..5ef8104 100644
--- a/core/modules/aggregator/src/FeedViewBuilder.php
+++ b/core/modules/aggregator/src/FeedViewBuilder.php
@@ -99,7 +99,7 @@ public function buildComponents(array &$build, array $entities, array $displays,
           $image_link = array(
             '#type' => 'link',
             '#title' => $link_title,
-            '#href' => $link_href,
+            '#path' => $link_href,
             '#options' => array(
               'attributes' => array('class' => array('feed-image')),
               'html' => TRUE,
diff --git a/core/modules/aggregator/src/Plugin/Block/AggregatorFeedBlock.php b/core/modules/aggregator/src/Plugin/Block/AggregatorFeedBlock.php
index f28ff0d..469bbf2 100644
--- a/core/modules/aggregator/src/Plugin/Block/AggregatorFeedBlock.php
+++ b/core/modules/aggregator/src/Plugin/Block/AggregatorFeedBlock.php
@@ -164,7 +164,7 @@ public function build() {
 
       $more_link = array(
         '#type' => 'more_link',
-        '#href' => 'aggregator/sources/' . $feed->id(),
+        '#path' => 'aggregator/sources/' . $feed->id(),
         '#attributes' => array('title' => $this->t("View this feed's recent news.")),
       );
       $read_more = drupal_render($more_link);
diff --git a/core/modules/block/block.module b/core/modules/block/block.module
index cbf56ab..d824b3b 100644
--- a/core/modules/block/block.module
+++ b/core/modules/block/block.module
@@ -93,7 +93,7 @@ function block_page_build(&$page) {
     $page['page_top']['backlink'] = array(
       '#type' => 'link',
       '#title' => t('Exit block region demonstration'),
-      '#href' => 'admin/structure/block' . (\Drupal::config('system.theme')->get('default') == $theme ? '' : '/list/' . $theme),
+      '#path' => 'admin/structure/block' . (\Drupal::config('system.theme')->get('default') == $theme ? '' : '/list/' . $theme),
       '#options' => array('attributes' => array('class' => array('block-demo-backlink'))),
       '#weight' => -10,
     );
diff --git a/core/modules/config/src/Controller/ConfigController.php b/core/modules/config/src/Controller/ConfigController.php
index 48b31df..700e35c 100644
--- a/core/modules/config/src/Controller/ConfigController.php
+++ b/core/modules/config/src/Controller/ConfigController.php
@@ -156,7 +156,7 @@ public function diff($source_name, $target_name = NULL, $collection = NULL) {
         ),
       ),
       '#title' => "Back to 'Synchronize configuration' page.",
-      '#href' => 'admin/config/development/configuration',
+      '#path' => 'admin/config/development/configuration',
     );
 
     return $build;
diff --git a/core/modules/field_ui/src/EntityDisplayModeListBuilder.php b/core/modules/field_ui/src/EntityDisplayModeListBuilder.php
index 2a73834..4dcbbdd 100644
--- a/core/modules/field_ui/src/EntityDisplayModeListBuilder.php
+++ b/core/modules/field_ui/src/EntityDisplayModeListBuilder.php
@@ -118,7 +118,7 @@ public function render() {
       $table['#rows']['_add_new'][] = array(
         'data' => array(
           '#type' => 'link',
-          '#href' => "admin/structure/display-modes/$short_type/add/$entity_type",
+          '#path' => "admin/structure/display-modes/$short_type/add/$entity_type",
           '#title' => t('Add new %label @entity-type', array('%label' => $this->entityTypes[$entity_type]->getLabel(), '@entity-type' => $this->entityType->getLowercaseLabel())),
           '#options' => array(
             'html' => TRUE,
diff --git a/core/modules/forum/src/Form/Overview.php b/core/modules/forum/src/Form/Overview.php
index eb05b3a..80645d9 100644
--- a/core/modules/forum/src/Form/Overview.php
+++ b/core/modules/forum/src/Form/Overview.php
@@ -65,7 +65,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     foreach (Element::children($form['terms']) as $key) {
       if (isset($form['terms'][$key]['#term'])) {
         $term = $form['terms'][$key]['#term'];
-        $form['terms'][$key]['term']['#href'] = 'forum/' . $term->id();
+        $form['terms'][$key]['term']['#path'] = 'forum/' . $term->id();
         unset($form['terms'][$key]['operations']['#links']['delete']);
         if (!empty($term->forum_container->value)) {
           $form['terms'][$key]['operations']['#links']['edit']['title'] = $this->t('edit container');
diff --git a/core/modules/forum/src/Plugin/Block/ForumBlockBase.php b/core/modules/forum/src/Plugin/Block/ForumBlockBase.php
index f480892..3476de4 100644
--- a/core/modules/forum/src/Plugin/Block/ForumBlockBase.php
+++ b/core/modules/forum/src/Plugin/Block/ForumBlockBase.php
@@ -27,7 +27,7 @@ public function build() {
       $elements['forum_list'] = $node_title_list;
       $elements['forum_more'] = array(
         '#type' => 'more_link',
-        '#href' => 'forum',
+        '#path' => 'forum',
         '#attributes' => array('title' => $this->t('Read the latest forum topics.')),
       );
     }
diff --git a/core/modules/language/tests/language_test/src/Controller/LanguageTestController.php b/core/modules/language/tests/language_test/src/Controller/LanguageTestController.php
index 2935b7d..a6f59fb 100644
--- a/core/modules/language/tests/language_test/src/Controller/LanguageTestController.php
+++ b/core/modules/language/tests/language_test/src/Controller/LanguageTestController.php
@@ -62,7 +62,7 @@ public function typeLinkActiveClass() {
       'no_language' => array(
         '#type' => 'link',
         '#title' => t('Link to the current path with no langcode provided.'),
-        '#href' => current_path(),
+        '#path' => current_path(),
         '#options' => array(
           'attributes' => array(
             'id' => 'no_lang_link',
@@ -73,7 +73,7 @@ public function typeLinkActiveClass() {
       'fr' => array(
         '#type' => 'link',
         '#title' => t('Link to a French version of the current path.'),
-        '#href' => current_path(),
+        '#path' => current_path(),
         '#options' => array(
           'language' => $languages['fr'],
           'attributes' => array(
@@ -85,7 +85,7 @@ public function typeLinkActiveClass() {
       'en' => array(
         '#type' => 'link',
         '#title' => t('Link to an English version of the current path.'),
-        '#href' => current_path(),
+        '#path' => current_path(),
         '#options' => array(
           'language' => $languages['en'],
           'attributes' => array(
diff --git a/core/modules/link/src/Plugin/Field/FieldFormatter/LinkFormatter.php b/core/modules/link/src/Plugin/Field/FieldFormatter/LinkFormatter.php
index ca753f8..7ed376c 100644
--- a/core/modules/link/src/Plugin/Field/FieldFormatter/LinkFormatter.php
+++ b/core/modules/link/src/Plugin/Field/FieldFormatter/LinkFormatter.php
@@ -164,7 +164,7 @@ public function viewElements(FieldItemListInterface $items) {
           '#options' => $url->getOptions(),
         );
         if ($url->isExternal()) {
-          $element[$delta]['#href'] = $url->getUri();
+          $element[$delta]['#path'] = $url->getUri();
         }
         else {
           $element[$delta]['#route_name'] = $url->getRouteName();
diff --git a/core/modules/node/src/Form/NodePreviewForm.php b/core/modules/node/src/Form/NodePreviewForm.php
index 81fd61c..fdb6793 100644
--- a/core/modules/node/src/Form/NodePreviewForm.php
+++ b/core/modules/node/src/Form/NodePreviewForm.php
@@ -81,7 +81,7 @@ public function buildForm(array $form, FormStateInterface $form_state, EntityInt
     $form['backlink'] = array(
       '#type' => 'link',
       '#title' => $this->t('Back to content editing'),
-      '#href' => $node->isNew() ? 'node/add/' . $node->bundle() :  'node/' . $node->id() . '/edit',
+      '#path' => $node->isNew() ? 'node/add/' . $node->bundle() :  'node/' . $node->id() . '/edit',
       '#options' => array('attributes' => array('class' => array('node-preview-backlink'))) + $query_options,
     );
 
diff --git a/core/modules/shortcut/shortcut.module b/core/modules/shortcut/shortcut.module
index 2575128..d3a5c9e 100644
--- a/core/modules/shortcut/shortcut.module
+++ b/core/modules/shortcut/shortcut.module
@@ -378,7 +378,7 @@ function shortcut_toolbar() {
         'tab' => array(
           '#type' => 'link',
           '#title' => t('Shortcuts'),
-          '#href' => 'admin/config/user-interface/shortcut',
+          '#path' => 'admin/config/user-interface/shortcut',
           '#attributes' => array(
             'title' => t('Shortcuts'),
             'class' => array('toolbar-icon', 'toolbar-icon-shortcut'),
diff --git a/core/modules/simpletest/src/Form/SimpletestResultsForm.php b/core/modules/simpletest/src/Form/SimpletestResultsForm.php
index 56d4f59..81ccd92 100644
--- a/core/modules/simpletest/src/Form/SimpletestResultsForm.php
+++ b/core/modules/simpletest/src/Form/SimpletestResultsForm.php
@@ -238,7 +238,7 @@ public function buildForm(array $form, FormStateInterface $form_state, $test_id
     $form['action']['return'] = array(
       '#type' => 'link',
       '#title' => $this->t('Return to list'),
-      '#href' => 'admin/config/development/testing',
+      '#path' => 'admin/config/development/testing',
     );
 
     if (is_numeric($test_id)) {
diff --git a/core/modules/system/src/Form/ModulesListForm.php b/core/modules/system/src/Form/ModulesListForm.php
index c1b2b73..63471f8 100644
--- a/core/modules/system/src/Form/ModulesListForm.php
+++ b/core/modules/system/src/Form/ModulesListForm.php
@@ -258,7 +258,7 @@ protected function buildRow(array $modules, Extension $module, $distribution) {
         $row['links']['help'] = array(
           '#type' => 'link',
           '#title' => $this->t('Help'),
-          '#href' => 'admin/help/' . $module->getName(),
+          '#path' => 'admin/help/' . $module->getName(),
           '#options' => array('attributes' => array('class' =>  array('module-link', 'module-link-help'), 'title' => $this->t('Help'))),
         );
       }
@@ -270,7 +270,7 @@ protected function buildRow(array $modules, Extension $module, $distribution) {
       $row['links']['permissions'] = array(
         '#type' => 'link',
         '#title' => $this->t('Permissions'),
-        '#href' => 'admin/people/permissions',
+        '#path' => 'admin/people/permissions',
         '#options' => array('fragment' => 'module-' . $module->getName(), 'attributes' => array('class' => array('module-link', 'module-link-permissions'), 'title' => $this->t('Configure permissions'))),
       );
     }
diff --git a/core/modules/system/src/Tests/Common/RenderElementTypesTest.php b/core/modules/system/src/Tests/Common/RenderElementTypesTest.php
index 9757a2b..cf3e0a4 100644
--- a/core/modules/system/src/Tests/Common/RenderElementTypesTest.php
+++ b/core/modules/system/src/Tests/Common/RenderElementTypesTest.php
@@ -112,7 +112,7 @@ function testMoreLink() {
         'name' => "#type 'more_link' anchor tag generation without extra classes",
         'value' => array(
           '#type' => 'more_link',
-          '#href' => 'http://drupal.org',
+          '#path' => 'http://drupal.org',
         ),
         'expected' => '//div[@class="more-link"]/a[@href="http://drupal.org" and text()="More"]',
       ),
@@ -120,7 +120,7 @@ function testMoreLink() {
         'name' => "#type 'more_link' anchor tag generation with different link text",
         'value' => array(
           '#type' => 'more_link',
-          '#href' => 'http://drupal.org',
+          '#path' => 'http://drupal.org',
           '#title' => 'More Titles',
         ),
         'expected' => '//div[@class="more-link"]/a[@href="http://drupal.org" and text()="More Titles"]',
@@ -129,7 +129,7 @@ function testMoreLink() {
         'name' => "#type 'more_link' anchor tag generation with attributes on wrapper",
         'value' => array(
           '#type' => 'more_link',
-          '#href' => 'http://drupal.org',
+          '#path' => 'http://drupal.org',
           '#theme_wrappers' => array(
             'container' => array(
               '#attributes' => array(
@@ -145,7 +145,7 @@ function testMoreLink() {
         'name' => "#type 'more_link' anchor tag with a relative path",
         'value' => array(
           '#type' => 'more_link',
-          '#href' => 'a/link',
+          '#path' => 'a/link',
         ),
         'expected' => '//div[@class="more-link"]/a[@href="' . _url('a/link') . '" and text()="More"]',
       ),
@@ -162,7 +162,7 @@ function testMoreLink() {
         'name' => "#type 'more_link' anchor tag with an absolute path",
         'value' => array(
           '#type' => 'more_link',
-          '#href' => 'admin/content',
+          '#path' => 'admin/content',
           '#options' => array('absolute' => TRUE),
         ),
         'expected' => '//div[@class="more-link"]/a[@href="' . _url('admin/content', array('absolute' => TRUE)) . '" and text()="More"]',
@@ -171,7 +171,7 @@ function testMoreLink() {
         'name' => "#type 'more_link' anchor tag to the front page",
         'value' => array(
           '#type' => 'more_link',
-          '#href' => '<front>',
+          '#path' => '<front>',
         ),
         'expected' => '//div[@class="more-link"]/a[@href="' . _url('<front>') . '" and text()="More"]',
       ),
diff --git a/core/modules/system/src/Tests/Common/RenderTest.php b/core/modules/system/src/Tests/Common/RenderTest.php
index d07085c..f0bbc72 100644
--- a/core/modules/system/src/Tests/Common/RenderTest.php
+++ b/core/modules/system/src/Tests/Common/RenderTest.php
@@ -120,7 +120,7 @@ function testDrupalRenderBasics() {
             ),
           ),
           '#attributes' => array('id' => 'foo'),
-          '#href' => 'http://drupal.org',
+          '#path' => 'http://drupal.org',
           '#title' => 'bar',
         ),
         'expected' => '<div class="baz"><a href="http://drupal.org" id="foo">bar</a></div>' . "\n",
@@ -131,7 +131,7 @@ function testDrupalRenderBasics() {
         'name' => '#theme_wrappers attribute disambiguation with undefined #theme attribute',
         'value' => array(
           '#type' => 'link',
-          '#href' => 'http://drupal.org',
+          '#path' => 'http://drupal.org',
           '#title' => 'foo',
           '#theme_wrappers' => array(
             'container' => array(
diff --git a/core/modules/system/src/Tests/Common/RenderWebTest.php b/core/modules/system/src/Tests/Common/RenderWebTest.php
index 3e58fb0..8549eb6 100644
--- a/core/modules/system/src/Tests/Common/RenderWebTest.php
+++ b/core/modules/system/src/Tests/Common/RenderWebTest.php
@@ -105,13 +105,13 @@ function testDrupalRenderFormElements() {
     $element = array(
       '#type' => 'link',
       '#title' => $this->randomMachineName(),
-      '#href' => $this->randomMachineName(),
+      '#path' => $this->randomMachineName(),
       '#options' => array(
         'absolute' => TRUE,
       ),
     );
     $this->assertRenderedElement($element, '//a[@href=:href and contains(., :title)]', array(
-      ':href' => _url($element['#href'], array('absolute' => TRUE)),
+      ':href' => _url($element['#path'], array('absolute' => TRUE)),
       ':title' => $element['#title'],
     ));
 
diff --git a/core/modules/system/src/Tests/Common/UrlTest.php b/core/modules/system/src/Tests/Common/UrlTest.php
index 0097512..7cbae18 100644
--- a/core/modules/system/src/Tests/Common/UrlTest.php
+++ b/core/modules/system/src/Tests/Common/UrlTest.php
@@ -42,7 +42,7 @@ function testLinkXSS() {
     $link_array =  array(
       '#type' => 'link',
       '#title' => $this->randomMachineName(),
-      '#href' => $path,
+      '#path' => $path,
     );
     $type_link = drupal_render($link_array);
     $sanitized_path = check_url(_url($path));
@@ -60,7 +60,7 @@ function testLinkAttributes() {
       '#options' => array(
         'language' => $language,
       ),
-      '#href' => 'http://drupal.org',
+      '#path' => 'http://drupal.org',
       '#title' => 'bar',
     );
     $langcode = $language->id;
@@ -122,7 +122,7 @@ function testLinkAttributes() {
     $type_link = array(
       '#type' => 'link',
       '#title' => $this->randomMachineName(),
-      '#href' => current_path(),
+      '#path' => current_path(),
       '#options' => array(
         'attributes' => array(
           'class' => array($class_theme),
@@ -149,7 +149,7 @@ function testLinkRenderArrayText() {
     $type_link_plain_array = array(
       '#type' => 'link',
       '#title' => 'foo',
-      '#href' => 'http://drupal.org',
+      '#path' => 'http://drupal.org',
     );
     $type_link_plain = drupal_render($type_link_plain_array);
     $this->assertEqual($type_link_plain, $l);
@@ -158,7 +158,7 @@ function testLinkRenderArrayText() {
     $type_link_nested_array = array(
       '#type' => 'link',
       '#title' => array('#markup' => 'foo'),
-      '#href' => 'http://drupal.org',
+      '#path' => 'http://drupal.org',
     );
     $type_link_nested = drupal_render($type_link_nested_array);
     $this->assertEqual($type_link_nested, $l);
diff --git a/core/modules/system/tests/modules/ajax_test/ajax_test.module b/core/modules/system/tests/modules/ajax_test/ajax_test.module
index 6127b2e..c57556f 100644
--- a/core/modules/system/tests/modules/ajax_test/ajax_test.module
+++ b/core/modules/system/tests/modules/ajax_test/ajax_test.module
@@ -108,7 +108,7 @@ function ajax_test_dialog_contents() {
     'cancel' => array(
       '#type' => 'link',
       '#title' => 'Cancel',
-      '#href' => '',
+      '#path' => '',
       '#attributes' => array(
         // This is a special class to which JavaScript assigns dialog closing
         // behavior.
diff --git a/core/modules/system/tests/modules/ajax_test/src/Controller/AjaxTestController.php b/core/modules/system/tests/modules/ajax_test/src/Controller/AjaxTestController.php
index ac0399f..ccbf9f7 100644
--- a/core/modules/system/tests/modules/ajax_test/src/Controller/AjaxTestController.php
+++ b/core/modules/system/tests/modules/ajax_test/src/Controller/AjaxTestController.php
@@ -56,7 +56,7 @@ public function dialog() {
     $build['link'] = array(
       '#type' => 'link',
       '#title' => 'Link 1 (modal)',
-      '#href' => 'ajax-test/dialog-contents',
+      '#path' => 'ajax-test/dialog-contents',
       '#attributes' => array(
         'class' => array('use-ajax'),
         'data-accepts' => 'application/vnd.drupal-modal',
diff --git a/core/modules/system/tests/modules/common_test/src/Controller/CommonTestController.php b/core/modules/system/tests/modules/common_test/src/Controller/CommonTestController.php
index be4ce96..27d6e93 100644
--- a/core/modules/system/tests/modules/common_test/src/Controller/CommonTestController.php
+++ b/core/modules/system/tests/modules/common_test/src/Controller/CommonTestController.php
@@ -25,7 +25,7 @@ public function typeLinkActiveClass() {
       'no_query' => array(
         '#type' => 'link',
         '#title' => t('Link with no query string'),
-        '#href' => current_path(),
+        '#path' => current_path(),
         '#options' => array(
           'set_active_class' => TRUE,
         ),
@@ -33,7 +33,7 @@ public function typeLinkActiveClass() {
       'with_query' => array(
         '#type' => 'link',
         '#title' => t('Link with a query string'),
-        '#href' => current_path(),
+        '#path' => current_path(),
         '#options' => array(
           'query' => array(
             'foo' => 'bar',
@@ -45,7 +45,7 @@ public function typeLinkActiveClass() {
       'with_query_reversed' => array(
         '#type' => 'link',
         '#title' => t('Link with the same query string in reverse order'),
-        '#href' => current_path(),
+        '#path' => current_path(),
         '#options' => array(
           'query' => array(
             'one' => 'two',
diff --git a/core/modules/system/tests/modules/theme_test/src/EventSubscriber/ThemeTestSubscriber.php b/core/modules/system/tests/modules/theme_test/src/EventSubscriber/ThemeTestSubscriber.php
index a02be18..fb25ecd 100644
--- a/core/modules/system/tests/modules/theme_test/src/EventSubscriber/ThemeTestSubscriber.php
+++ b/core/modules/system/tests/modules/theme_test/src/EventSubscriber/ThemeTestSubscriber.php
@@ -44,7 +44,7 @@ public function onRequest(GetResponseEvent $event) {
       // returning output and theming the page as a whole.
       $more_link = array(
         '#type' => 'more_link',
-        '#href' => 'user',
+        '#path' => 'user',
         '#attributes' => array('title' => 'Themed output generated in a KernelEvents::REQUEST listener'),
       );
       $GLOBALS['theme_test_output'] = drupal_render($more_link);
diff --git a/core/modules/telephone/src/Plugin/Field/FieldFormatter/TelephoneLinkFormatter.php b/core/modules/telephone/src/Plugin/Field/FieldFormatter/TelephoneLinkFormatter.php
index ef45d4e..6f25c95 100644
--- a/core/modules/telephone/src/Plugin/Field/FieldFormatter/TelephoneLinkFormatter.php
+++ b/core/modules/telephone/src/Plugin/Field/FieldFormatter/TelephoneLinkFormatter.php
@@ -78,7 +78,7 @@ public function viewElements(FieldItemListInterface $items) {
         // itself as title.
         '#title' => $title_setting ?: $item->value,
         // Prepend 'tel:' to the telephone number.
-        '#href' => 'tel:' . rawurlencode(preg_replace('/\s+/', '', $item->value)),
+        '#path' => 'tel:' . rawurlencode(preg_replace('/\s+/', '', $item->value)),
         '#options' => array('external' => TRUE),
       );
 
diff --git a/core/modules/toolbar/src/Element/ToolbarItem.php b/core/modules/toolbar/src/Element/ToolbarItem.php
index 18ade46..bacba17 100644
--- a/core/modules/toolbar/src/Element/ToolbarItem.php
+++ b/core/modules/toolbar/src/Element/ToolbarItem.php
@@ -33,7 +33,7 @@ public function getInfo() {
       'tab' => array(
         '#type' => 'link',
         '#title' => NULL,
-        '#href' => '',
+        '#path' => '',
       ),
     );
   }
diff --git a/core/modules/toolbar/tests/modules/toolbar_test/toolbar_test.module b/core/modules/toolbar/tests/modules/toolbar_test/toolbar_test.module
index 69dac7a..9730920 100644
--- a/core/modules/toolbar/tests/modules/toolbar_test/toolbar_test.module
+++ b/core/modules/toolbar/tests/modules/toolbar_test/toolbar_test.module
@@ -17,7 +17,7 @@ function toolbar_test_toolbar() {
     'tab' => array(
       '#type' => 'link',
       '#title' => t('Test tab'),
-      '#href' => '',
+      '#path' => '',
       '#options' => array(
         'html' => FALSE,
         'attributes' => array(
diff --git a/core/modules/toolbar/toolbar.api.php b/core/modules/toolbar/toolbar.api.php
index ab9b75a..b9d7731 100644
--- a/core/modules/toolbar/toolbar.api.php
+++ b/core/modules/toolbar/toolbar.api.php
@@ -72,7 +72,7 @@ function hook_toolbar() {
     'tab' => array(
       '#type' => 'link',
       '#title' => t('Home'),
-      '#href' => '<front>',
+      '#path' => '<front>',
       '#options' => array(
         'attributes' => array(
           'title' => t('Home page'),
@@ -96,7 +96,7 @@ function hook_toolbar() {
     'tab' => array(
       '#type' => 'link',
       '#title' => t('Shopping cart'),
-      '#href' => '/cart',
+      '#path' => '/cart',
       '#options' => array(
         'html' => FALSE,
         'attributes' => array(
@@ -131,7 +131,7 @@ function hook_toolbar() {
       '#theme' => 'user_message_toolbar_tab',
       '#theme_wrappers' => array(),
       '#title' => t('Messages'),
-      '#href' => '/user/messages',
+      '#path' => '/user/messages',
       '#options' => array(
         'attributes' => array(
           'title' => t('Messages'),
diff --git a/core/modules/toolbar/toolbar.module b/core/modules/toolbar/toolbar.module
index 815d1cf..3c6687e 100644
--- a/core/modules/toolbar/toolbar.module
+++ b/core/modules/toolbar/toolbar.module
@@ -95,7 +95,7 @@ function toolbar_element_info() {
     'tab' => array(
       '#type' => 'link',
       '#title' => NULL,
-      '#href' => '',
+      '#path' => '',
     ),
   );
   return $elements;
@@ -180,7 +180,7 @@ function toolbar_toolbar() {
     'tab' => array(
       '#type' => 'link',
       '#title' => t('Back to site'),
-      '#href' => '<front>',
+      '#path' => '<front>',
       '#attributes' => array(
         'title' => t('Return to site content'),
         'class' => array('toolbar-icon', 'toolbar-icon-escape-admin'),
@@ -219,7 +219,7 @@ function toolbar_toolbar() {
     'tab' => array(
       '#type' => 'link',
       '#title' => t('Manage'),
-      '#href' => 'admin',
+      '#path' => 'admin',
       '#attributes' => array(
         'title' => t('Admin menu'),
         'class' => array('toolbar-icon', 'toolbar-icon-menu'),
diff --git a/core/modules/user/user.module b/core/modules/user/user.module
index 82aca31..1cb76d0 100644
--- a/core/modules/user/user.module
+++ b/core/modules/user/user.module
@@ -1484,7 +1484,7 @@ function user_toolbar() {
     'tab' => array(
       '#type' => 'link',
       '#title' => $user->getUsername(),
-      '#href' => 'user',
+      '#path' => 'user',
       '#attributes' => array(
         'title' => t('My account'),
         'class' => array('toolbar-icon', 'toolbar-icon-user'),
diff --git a/core/modules/views/views.theme.inc b/core/modules/views/views.theme.inc
index 9ab4be0..e4d3934 100644
--- a/core/modules/views/views.theme.inc
+++ b/core/modules/views/views.theme.inc
@@ -1045,7 +1045,7 @@ function template_preprocess_views_mini_pager(&$variables) {
     $li_previous = array(
       '#type' => 'link',
       '#title' => $tags[1],
-      '#href' => $current_path,
+      '#path' => $current_path,
       '#options' => array(
         'query' => pager_query_add_page($parameters, $element, $pager_page_array[$element] - 1),
         'attributes' => array(
@@ -1068,7 +1068,7 @@ function template_preprocess_views_mini_pager(&$variables) {
     $li_next = array(
       '#type' => 'link',
       '#title' => $tags[3],
-      '#href' => $current_path,
+      '#path' => $current_path,
       '#options' => array(
         'query' => pager_query_add_page($parameters, $element, $pager_page_array[$element] + 1),
         'attributes' => array(
diff --git a/core/modules/views_ui/src/Form/Ajax/ReorderDisplays.php b/core/modules/views_ui/src/Form/Ajax/ReorderDisplays.php
index c6e24db..990263a 100644
--- a/core/modules/views_ui/src/Form/Ajax/ReorderDisplays.php
+++ b/core/modules/views_ui/src/Form/Ajax/ReorderDisplays.php
@@ -120,7 +120,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
         'link' => array(
           '#type' => 'link',
           '#title' => '<span>' . $this->t('Remove') . '</span>',
-          '#href' => 'javascript:void()',
+          '#path' => 'javascript:void()',
           '#options' => array(
             'html' => TRUE,
           ),
diff --git a/core/modules/views_ui/src/ViewEditForm.php b/core/modules/views_ui/src/ViewEditForm.php
index e621513..48a64e6 100644
--- a/core/modules/views_ui/src/ViewEditForm.php
+++ b/core/modules/views_ui/src/ViewEditForm.php
@@ -427,7 +427,7 @@ public function getDisplayDetails($view, $display) {
               '#type' => 'link',
               '#title' => $this->t('View !display_title', array('!display_title' => $display_title)),
               '#options' => array('alt' => array($this->t("Go to the real page for this display"))),
-              '#href' => $path,
+              '#path' => $path,
               '#prefix' => '<li class="view">',
               "#suffix" => '</li>',
             );
diff --git a/core/modules/views_ui/views_ui.theme.inc b/core/modules/views_ui/views_ui.theme.inc
index 80f2f45..3a44328 100644
--- a/core/modules/views_ui/views_ui.theme.inc
+++ b/core/modules/views_ui/views_ui.theme.inc
@@ -283,7 +283,7 @@ function template_preprocess_views_ui_rearrange_filter_form(&$variables) {
 
         $remove_link = array(
           '#type' => 'link',
-          '#href' => '',
+          '#path' => '',
           '#title' => '<span>' . t('Remove') . '</span>',
           '#weight' => '1',
           '#options' => array(
diff --git a/core/tests/Drupal/Tests/Core/Form/ConfirmFormHelperTest.php b/core/tests/Drupal/Tests/Core/Form/ConfirmFormHelperTest.php
index 176d5b4..7a589cc 100644
--- a/core/tests/Drupal/Tests/Core/Form/ConfirmFormHelperTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/ConfirmFormHelperTest.php
@@ -108,7 +108,7 @@ public function testCancelLinkDestination() {
     $query = array('destination' => 'baz');
     $form = $this->getMock('Drupal\Core\Form\ConfirmFormInterface');
     $link = ConfirmFormHelper::buildCancelLink($form, new Request($query));
-    $this->assertSame($query['destination'], $link['#href']);
+    $this->assertSame($query['destination'], $link['#path']);
   }
 
 }