diff --git a/core/lib/Drupal/Core/CoreBundle.php b/core/lib/Drupal/Core/CoreBundle.php
index 994ff18..244bf01 100644
--- a/core/lib/Drupal/Core/CoreBundle.php
+++ b/core/lib/Drupal/Core/CoreBundle.php
@@ -7,6 +7,7 @@
 
 namespace Drupal\Core;
 
+use Drupal\Core\DependencyInjection\Compiler\ViewRespondersPass;
 use Drupal\Core\DependencyInjection\Compiler\RegisterKernelListenersPass;
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
@@ -51,6 +52,16 @@ class CoreBundle extends Bundle
     $container->register('view_subscriber', 'Drupal\Core\EventSubscriber\ViewSubscriber')
       ->addArgument(new Reference('content_negotiation'))
       ->addTag('kernel.event_subscriber');
+    // Add format responders.
+    $container->register('html_responder', 'Drupal\Core\EventSubscriber\ViewResponder\HtmlResponder')
+      ->addTag('kernel.view.responder', array('format' => 'html'));
+    $container->register('json_responder', 'Drupal\Core\EventSubscriber\ViewResponder\JsonResponder')
+      ->addTag('kernel.view.responder', array('format' => 'json'));
+    $container->register('ajax_responder', 'Drupal\Core\EventSubscriber\ViewResponder\AjaxResponder')
+      ->addTag('kernel.view.responder', array('format' => 'ajax'));
+    $container->register('iframe_upload_responder', 'Drupal\Core\EventSubscriber\ViewResponder\IframeUploadResponder')
+      ->addTag('kernel.view.responder', array('format' => 'iframeupload'));
+
     $container->register('access_subscriber', 'Drupal\Core\EventSubscriber\AccessSubscriber')
       ->addTag('kernel.event_subscriber');
     $container->register('maintenance_mode_subscriber', 'Drupal\Core\EventSubscriber\MaintenanceModeSubscriber')
@@ -83,5 +94,8 @@ class CoreBundle extends Bundle
 
     // Add a compiler pass for registering event subscribers.
     $container->addCompilerPass(new RegisterKernelListenersPass(), PassConfig::TYPE_AFTER_REMOVING);
+
+    // Add a compiler pass for adding View responders.
+    $container->addCompilerPass(new ViewRespondersPass(), PassConfig::TYPE_AFTER_REMOVING);
   }
 }
diff --git a/core/lib/Drupal/Core/DependencyInjection/Compiler/ViewRespondersPass.php b/core/lib/Drupal/Core/DependencyInjection/Compiler/ViewRespondersPass.php
new file mode 100644
index 0000000..5d802e2
--- /dev/null
+++ b/core/lib/Drupal/Core/DependencyInjection/Compiler/ViewRespondersPass.php
@@ -0,0 +1,32 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\Core\DependencyInjection\Compiler\RegisterKernelListenersPass.
+ */
+
+namespace Drupal\Core\DependencyInjection\Compiler;
+
+use InvalidArgumentException;
+use ReflectionClass;
+use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+
+class ViewRespondersPass implements CompilerPassInterface {
+  public function process(ContainerBuilder $container) {
+    if (!$container->hasDefinition('view_subscriber')) {
+      return;
+    }
+
+    $definition = $container->getDefinition('view_subscriber');
+
+    foreach ($container->findTaggedServiceIds('kernel.view.responder') as $id => $attributes) {
+      if (!isset($attributes[0]['format'])) {
+          throw new \RuntimeException(sprintf('The format for the kernel.view.responder service "%s" must be set.', $id));
+      }
+
+      $definition->addMethodCall('addResponder', array($attributes[0]['format'], new Reference($id)));
+    }
+  }
+}
diff --git a/core/lib/Drupal/Core/EventSubscriber/ViewResponder/AjaxResponder.php b/core/lib/Drupal/Core/EventSubscriber/ViewResponder/AjaxResponder.php
new file mode 100644
index 0000000..4220371
--- /dev/null
+++ b/core/lib/Drupal/Core/EventSubscriber/ViewResponder/AjaxResponder.php
@@ -0,0 +1,26 @@
+<?php
+/**
+ * @file
+ * Definition of Drupal\Core\EventSubscriber\ViewResponder\JsonResponser.
+ */
+
+namespace Drupal\Core\EventSubscriber\ViewResponder;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent;
+
+class AjaxResponder implements ViewResponderInterface {
+
+  public function getResponse(GetResponseForControllerResultEvent $event) {
+    $page_callback_result = $event->getControllerResult();
+
+    // Construct the response content from the page callback result.
+    $commands = ajax_prepare_response($page_callback_result);
+    $json = ajax_render($commands);
+
+    // Build the actual response object.
+    $response = new JsonResponse();
+    $response->setContent($json);
+
+    return $response;
+  }
+}
diff --git a/core/lib/Drupal/Core/EventSubscriber/ViewResponder/HtmlResponder.php b/core/lib/Drupal/Core/EventSubscriber/ViewResponder/HtmlResponder.php
new file mode 100644
index 0000000..82fdeca
--- /dev/null
+++ b/core/lib/Drupal/Core/EventSubscriber/ViewResponder/HtmlResponder.php
@@ -0,0 +1,17 @@
+<?php
+/**
+ * @file
+ * Definition of Drupal\Core\EventSubscriber\ViewResponder\HtmlResponder.
+ */
+
+namespace Drupal\Core\EventSubscriber\ViewResponder;
+
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent;
+
+class HtmlResponder implements ViewResponderInterface {
+  public function getResponse(GetResponseForControllerResultEvent $event) {
+    $page_callback_result = $event->getControllerResult();
+    return new Response(drupal_render_page($page_callback_result));
+  }
+}
diff --git a/core/lib/Drupal/Core/EventSubscriber/ViewResponder/IframeUploadResponder.php b/core/lib/Drupal/Core/EventSubscriber/ViewResponder/IframeUploadResponder.php
new file mode 100644
index 0000000..643adc9
--- /dev/null
+++ b/core/lib/Drupal/Core/EventSubscriber/ViewResponder/IframeUploadResponder.php
@@ -0,0 +1,29 @@
+<?php
+/**
+ * @file
+ * Definition of Drupal\Core\EventSubscriber\ViewResponder\JsonResponser.
+ */
+
+namespace Drupal\Core\EventSubscriber\ViewResponder;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent;
+
+class IframeUploadResponder implements ViewResponderInterface {
+  public function getResponse(GetResponseForControllerResultEvent $event) {
+    $page_callback_result = $event->getControllerResult();
+
+    // Construct the response content from the page callback result.
+    $commands = ajax_prepare_response($page_callback_result);
+    $json = ajax_render($commands);
+
+    // Browser IFRAMEs expect HTML. Browser extensions, such as Linkification
+    // and Skype's Browser Highlighter, convert URLs, phone numbers, etc. into
+    // links. This corrupts the JSON response. Protect the integrity of the
+    // JSON data by making it the value of a textarea.
+    // @see http://malsup.com/jquery/form/#file-upload
+    // @see http://drupal.org/node/1009382
+    $html = '<textarea>' . $json . '</textarea>';
+
+    return new Response($html);
+  }
+}
diff --git a/core/lib/Drupal/Core/EventSubscriber/ViewResponder/JsonResponder.php b/core/lib/Drupal/Core/EventSubscriber/ViewResponder/JsonResponder.php
new file mode 100644
index 0000000..13de0d3
--- /dev/null
+++ b/core/lib/Drupal/Core/EventSubscriber/ViewResponder/JsonResponder.php
@@ -0,0 +1,21 @@
+<?php
+/**
+ * @file
+ * Definition of Drupal\Core\EventSubscriber\ViewResponder\JsonResponser.
+ */
+
+namespace Drupal\Core\EventSubscriber\ViewResponder;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent;
+
+class JsonResponder implements ViewResponderInterface {
+
+  public function getResponse(GetResponseForControllerResultEvent $event) {
+    $page_callback_result = $event->getControllerResult();
+
+    $response = new JsonResponse();
+    $response->setContent($page_callback_result);
+
+    return $response;
+  }
+}
diff --git a/core/lib/Drupal/Core/EventSubscriber/ViewResponder/ViewResponderInterface.php b/core/lib/Drupal/Core/EventSubscriber/ViewResponder/ViewResponderInterface.php
new file mode 100644
index 0000000..a160cba
--- /dev/null
+++ b/core/lib/Drupal/Core/EventSubscriber/ViewResponder/ViewResponderInterface.php
@@ -0,0 +1,13 @@
+<?php
+/**
+ * @file
+ * Definition of Drupal\Core\EventSubscriber\ViewResponder\ViewResponderInterface.
+ */
+
+namespace Drupal\Core\EventSubscriber\ViewResponder;
+
+use Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent;
+
+interface ViewResponderInterface {
+  public function getResponse(GetResponseForControllerResultEvent $event);
+}
diff --git a/core/lib/Drupal/Core/EventSubscriber/ViewSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/ViewSubscriber.php
index 637d48d..8155ea2 100644
--- a/core/lib/Drupal/Core/EventSubscriber/ViewSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/ViewSubscriber.php
@@ -12,6 +12,7 @@ use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpKernel\KernelEvents;
 use Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Drupal\Core\EventSubscriber\ViewResponder\ViewResponderInterface;
 
 use Drupal\Core\ContentNegotiation;
 
@@ -26,10 +27,16 @@ class ViewSubscriber implements EventSubscriberInterface {
 
   protected $negotiation;
 
+  protected $responders;
+
   public function __construct(ContentNegotiation $negotiation) {
     $this->negotiation = $negotiation;
   }
 
+  public function addResponder($format, ViewResponderInterface $responder) {
+    $this->responders[$format] = $responder;
+  }
+
   /**
    * Processes a successful controller into an HTTP 200 response.
    *
@@ -43,77 +50,18 @@ class ViewSubscriber implements EventSubscriberInterface {
    *   The Event to process.
    */
   public function onView(GetResponseForControllerResultEvent $event) {
-
     $request = $event->getRequest();
+    $content_type = $this->negotiation->getContentType($request);
 
-    $method = 'on' . $this->negotiation->getContentType($request);
-
-    if (method_exists($this, $method)) {
-      $event->setResponse($this->$method($event));
+    if (isset($this->responders[$content_type])) {
+      $responder = $this->responders[$content_type];
+      $event->setResponse($responder->getResponse($event));
     }
     else {
       $event->setResponse(new Response('Unsupported Media Type', 415));
     }
   }
 
-  public function onJson(GetResponseForControllerResultEvent $event) {
-    $page_callback_result = $event->getControllerResult();
-
-    $response = new JsonResponse();
-    $response->setContent($page_callback_result);
-
-    return $response;
-  }
-
-  public function onAjax(GetResponseForControllerResultEvent $event) {
-    $page_callback_result = $event->getControllerResult();
-
-    // Construct the response content from the page callback result.
-    $commands = ajax_prepare_response($page_callback_result);
-    $json = ajax_render($commands);
-
-    // Build the actual response object.
-    $response = new JsonResponse();
-    $response->setContent($json);
-
-    return $response;
-  }
-
-  public function onIframeUpload(GetResponseForControllerResultEvent $event) {
-    $page_callback_result = $event->getControllerResult();
-
-    // Construct the response content from the page callback result.
-    $commands = ajax_prepare_response($page_callback_result);
-    $json = ajax_render($commands);
-
-    // Browser IFRAMEs expect HTML. Browser extensions, such as Linkification
-    // and Skype's Browser Highlighter, convert URLs, phone numbers, etc. into
-    // links. This corrupts the JSON response. Protect the integrity of the
-    // JSON data by making it the value of a textarea.
-    // @see http://malsup.com/jquery/form/#file-upload
-    // @see http://drupal.org/node/1009382
-    $html = '<textarea>' . $json . '</textarea>';
-
-    return new Response($html);
-  }
-
-  /**
-   * Processes a successful controller into an HTTP 200 response.
-   *
-   * Some controllers may not return a response object but simply the body of
-   * one. The VIEW event is called in that case, to allow us to mutate that
-   * body into a Response object. In particular we assume that the return from
-   * an HTML-type response is a render array from a legacy page callback and
-   * render it.
-   *
-   * @param Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent $event
-   *   The Event to process.
-   */
-  public function onHtml(GetResponseForControllerResultEvent $event) {
-    $page_callback_result = $event->getControllerResult();
-    return new Response(drupal_render_page($page_callback_result));
-  }
-
   /**
    * Registers the methods in this class that should be listeners.
    *