Index: INSTALL.txt
===================================================================
RCS file: /cvs/drupal/drupal/INSTALL.txt,v
retrieving revision 1.77
diff -u -p -r1.77 INSTALL.txt
--- INSTALL.txt	31 Jan 2010 18:31:46 -0000	1.77
+++ INSTALL.txt	4 Feb 2010 10:50:50 -0000
@@ -237,7 +237,7 @@ INSTALLATION
    Note, however, that cron tasks will only be executed when there are site
    visitors. You can enable the built-in cron feature at:
 
-          Administer > Configuration and modules > Development > Maintenance mode
+          Administer > Configuration > System > Site information
 
    Advanced users may want to ensure that cron tasks are executed periodically.
    To do this, visit the page "cron.php", which executes maintenance tasks on
Index: includes/common.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/common.inc,v
retrieving revision 1.1097
diff -u -p -r1.1097 common.inc
--- includes/common.inc	1 Feb 2010 07:06:14 -0000	1.1097
+++ includes/common.inc	4 Feb 2010 10:50:51 -0000
@@ -4528,6 +4528,8 @@ function _drupal_bootstrap_full() {
   fix_gpc_magic();
   // Load all enabled modules
   module_load_all();
+  // Register automated cron run handler.
+  register_shutdown_function('system_run_automated_cron');
   // Make sure all stream wrappers are registered.
   file_get_stream_wrappers();
   if (isset($_SERVER['HTTP_USER_AGENT']) && strpos($_SERVER['HTTP_USER_AGENT'], 'simpletest') !== FALSE) {
Index: modules/system/system.admin.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.admin.inc,v
retrieving revision 1.256
diff -u -p -r1.256 system.admin.inc
--- modules/system/system.admin.inc	30 Jan 2010 07:54:01 -0000	1.256
+++ modules/system/system.admin.inc	4 Feb 2010 10:50:51 -0000
@@ -1560,7 +1560,6 @@ function system_site_information_setting
   );
 
   $form['#validate'][] = 'system_site_information_settings_validate';
-  $form['#submit'][] = 'system_site_information_settings_submit';
 
   return system_settings_form($form, FALSE);
 }
@@ -1582,18 +1581,6 @@ function system_site_information_setting
 }
 
 /**
- * Form submit handler for the site-information form.
- */
-function system_site_information_settings_submit($form, &$form_state) {
-  // Clear caches when the cron threshold is changed to ensure that the cron
-  // image is not contained in cached pages.
-  $cron_threshold = variable_get('cron_safe_threshold', DRUPAL_CRON_DEFAULT_THRESHOLD);
-  if ($cron_threshold != $form_state['input']['cron_safe_threshold']) {
-    cache_clear_all();
-  }
-}
-
-/**
  * Form builder; Configure error reporting settings.
  *
  * @ingroup forms
Index: modules/system/system.cron.js
===================================================================
RCS file: modules/system/system.cron.js
diff -N modules/system/system.cron.js
--- modules/system/system.cron.js	15 Dec 2009 08:45:32 -0000	1.1
+++ /dev/null	1 Jan 1970 00:00:00 -0000
@@ -1,20 +0,0 @@
-// $Id: system.cron.js,v 1.1 2009/12/15 08:45:32 dries Exp $
-(function ($) {
-
-/**
- * Checks to see if the cron should be automatically run.
- */
-Drupal.behaviors.cronCheck = {
-  attach: function(context, settings) {
-    if (settings.cronCheck || false) {
-      $('body').once('cron-check', function() {
-        // Only execute the cron check if its the right time.
-        if (Math.round(new Date().getTime() / 1000.0) > settings.cronCheck) {
-          $.get(settings.basePath + 'system/run-cron-check');
-        }
-      });
-    }
-  }
-};
-
-})(jQuery);
Index: modules/system/system.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.module,v
retrieving revision 1.884
diff -u -p -r1.884 system.module
--- modules/system/system.module	2 Feb 2010 08:10:03 -0000	1.884
+++ modules/system/system.module	4 Feb 2010 10:50:51 -0000
@@ -527,13 +527,6 @@ function system_menu() {
     'type' => MENU_CALLBACK,
     'file' => 'system.admin.inc',
   );
-  $items['system/run-cron-check'] = array(
-    'title' => 'Execute cron',
-    'page callback' => 'system_run_cron_check',
-    'access callback' => 'system_run_cron_check_access',
-    'type' => MENU_CALLBACK,
-    'file' => 'system.admin.inc',
-  );
   $items['admin'] = array(
     'title' => 'Administer',
     'access arguments' => array('access administration pages'),
@@ -3084,32 +3077,6 @@ function system_retrieve_file($url, $des
 }
 
 /**
- * Implements hook_page_build().
- */
-function system_page_build(&$page) {
-  // Automatic cron runs.
-  $cron_threshold = variable_get('cron_safe_threshold', DRUPAL_CRON_DEFAULT_THRESHOLD);
-  if ($cron_threshold) {
-    $page['page_bottom']['run_cron'] = array(
-      // Trigger cron run via AJAX.
-      '#attached' => array(
-        'js' => array(
-          drupal_get_path('module', 'system') . '/system.cron.js' => array('weight' => JS_DEFAULT - 5),
-          array(
-            'data' => array(
-              // Add the timestamp for the next automatic cron run.
-              'cronCheck' => variable_get('cron_last', 0) + $cron_threshold,
-            ),
-            'type' => 'setting',
-          ),
-
-        ),
-      ),
-    );
-  }
-}
-
-/**
  * Implements hook_page_alter().
  */
 function system_page_alter(&$page) {
@@ -3125,65 +3092,15 @@ function system_page_alter(&$page) {
 }
 
 /**
- * Menu callback; executes cron via an AJAX callback.
- *
- * This callback runs cron in a separate HTTP request to prevent "mysterious"
- * slow-downs of regular HTTP requests. It is invoked via an AJAX request and
- * does not process the returned output.
- *
- * @see system_page_alter()
- * @see system_run_cron_check_access()
- */
-function system_run_cron_check() {
-  $cron_run = FALSE;
-  $cron_threshold = variable_get('cron_safe_threshold', DRUPAL_CRON_DEFAULT_THRESHOLD);
-
-  // Cron threshold semaphore is used to avoid errors every time the image
-  // callback is displayed when a previous cron is still running.
-  $threshold_semaphore = variable_get('cron_threshold_semaphore', FALSE);
-  if ($threshold_semaphore) {
-    if (REQUEST_TIME - $threshold_semaphore > 3600) {
-      // Either cron has been running for more than an hour or the semaphore
-      // was not reset due to a database error.
-      watchdog('cron', 'Cron has been running for more than an hour and is most likely stuck.', array(), WATCHDOG_ERROR);
-
-      // Release the cron threshold semaphore.
-      variable_del('cron_threshold_semaphore');
-    }
-  }
-  else {
+ * Run the automated cron if enabled.
+ */
+function system_run_automated_cron() {
+  if (($threshold = variable_get('cron_safe_threshold', DRUPAL_CRON_DEFAULT_THRESHOLD)) > 0) {
     $cron_last = variable_get('cron_last', NULL);
-    // Run cron automatically if it has never run or threshold was crossed.
-    if (!isset($cron_last) || (REQUEST_TIME - $cron_last > $cron_threshold)) {
-      // Lock cron threshold semaphore.
-      variable_set('cron_threshold_semaphore', REQUEST_TIME);
-      $cron_run = drupal_cron_run();
-      // Release the cron threshold semaphore.
-      variable_del('cron_threshold_semaphore');
+    if (!isset($cron_last) || (REQUEST_TIME - $cron_last > $threshold)) {
+      drupal_cron_run();
     }
   }
-
-  // Add an expires header with the time of the next cron run.
-  $cron_last = variable_get('cron_last', NULL);
-  drupal_add_http_header('Expires', gmdate(DATE_RFC1123, $cron_last + $cron_threshold));
-
-  drupal_json_output(array('cron_run' => $cron_run));
-  drupal_page_footer();
-}
-
-/**
- * Checks if the feature to automatically run cron is enabled.
- *
- * Also used as a menu access callback for this feature.
- *
- * @return
- *   TRUE if cron threshold is enabled, FALSE otherwise.
- *
- * @see system_run_cron_check()
- * @see system_page_alter()
- */
-function system_run_cron_check_access() {
-  return variable_get('cron_safe_threshold', DRUPAL_CRON_DEFAULT_THRESHOLD) > 0;
 }
 
 /**
Index: modules/system/system.test
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.test,v
retrieving revision 1.107
diff -u -p -r1.107 system.test
--- modules/system/system.test	30 Jan 2010 07:59:25 -0000	1.107
+++ modules/system/system.test	4 Feb 2010 10:50:51 -0000
@@ -422,7 +422,7 @@ class CronRunTestCase extends DrupalWebT
   }
 
   /**
-   * Ensure that the automatic cron run callback is working.
+   * Ensure that the automatic cron run feature is working.
    *
    * In these tests we do not use REQUEST_TIME to track start time, because we
    * need the exact time when cron is triggered.
@@ -435,19 +435,13 @@ class CronRunTestCase extends DrupalWebT
     variable_set('cron_last', $cron_last);
     variable_set('cron_safe_threshold', $cron_safe_threshold);
     $this->drupalGet('');
-    $this->assertRaw('"cronCheck":' . ($cron_last + $cron_safe_threshold));
-    $this->drupalGet('system/run-cron-check');
-    $this->assertExpiresHeader($cron_last + $cron_safe_threshold);
     $this->assertTrue($cron_last == variable_get('cron_last', NULL), t('Cron does not run when the cron threshold is not passed.'));
 
     // Test if cron runs when the cron threshold was passed.
     $cron_last = time() - 200;
     variable_set('cron_last', $cron_last);
     $this->drupalGet('');
-    $this->assertRaw('"cronCheck":' . ($cron_last + $cron_safe_threshold));
     sleep(1);
-    $this->drupalGet('system/run-cron-check');
-    $this->assertExpiresHeader(variable_get('cron_last', NULL) + $cron_safe_threshold);
     $this->assertTrue($cron_last < variable_get('cron_last', NULL), t('Cron runs when the cron threshold is passed.'));
 
     // Disable the cron threshold through the interface.
@@ -461,25 +455,10 @@ class CronRunTestCase extends DrupalWebT
     $cron_last = time() - 200;
     variable_set('cron_last', $cron_last);
     $this->drupalGet('');
-    $this->assertNoRaw('cronCheck');
-    $this->drupalGet('system/run-cron-check');
-    $this->assertResponse(403);
     $this->assertTrue($cron_last == variable_get('cron_last', NULL), t('Cron does not run when the cron threshold is disabled.'));
   }
 
   /**
-   * Assert that the Expires header is a specific timestamp.
-   *
-   * @param $timestamp
-   *   The timestamp value to match against the header.
-   */
-  private function assertExpiresHeader($timestamp) {
-    $expires = $this->drupalGetHeader('Expires');
-    $expires = strtotime($expires);
-    $this->assertEqual($expires, $timestamp, t('Expires header expected @expected got @actual.', array('@expected' => $timestamp, '@actual' => $expires)));
-  }
-
-  /**
    * Ensure that temporary files are removed.
    *
    * Create files for all the possible combinations of age and status. We are