Reland of Remove content::NotificationPermissionDispatcher.

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index 2916939c89001d44b38489bcf6ddb43d2a7c1562..c39992face155de1b11226c08d582abe13289e72 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -133,7 +133,6 @@ class MediaStreamRendererFactory;
 class MediaPermissionDispatcher;
 class MidiDispatcher;
 class NavigationState;
-class NotificationPermissionDispatcher;
 class PageState;
 class PepperPluginInstanceImpl;
 class PresentationDispatcher;
@@ -545,9 +544,6 @@ class CONTENT_EXPORT RenderFrameImpl
   void didChangeThemeColor() override;
   void dispatchLoad() override;
   blink::WebEffectiveConnectionType getEffectiveConnectionType() override;
-  void requestNotificationPermission(
-      const blink::WebSecurityOrigin& origin,
-      blink::WebNotificationPermissionCallback* callback) override;
   void didChangeSelection(bool is_empty_selection) override;
   blink::WebColorChooser* createColorChooser(
       blink::WebColorChooserClient* client,
@@ -1142,9 +1138,6 @@ class CONTENT_EXPORT RenderFrameImpl
   // along with the RenderFrame automatically.  This is why we just store weak
   // references.
 
-  // Dispatches permission requests for Web Notifications.
-  NotificationPermissionDispatcher* notification_permission_dispatcher_;
-
   // Destroyed via the RenderFrameObserver::OnDestruct() mechanism.
   UserMediaClientImpl* web_user_media_client_;