Convert push_messaging IPC msgs into mojo interfaces

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 cc28f1f41ab015f8dbed479de9a5fb226d4e22dc..0b652b9603baa8442fe4a88736573043130cee90 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -143,7 +143,7 @@ class MediaPermissionDispatcher;
 class NavigationState;
 class PepperPluginInstanceImpl;
 class PresentationDispatcher;
-class PushMessagingDispatcher;
+class PushMessagingClient;
 class RenderAccessibilityImpl;
 class RendererMediaPlayerManager;
 class RendererPpapiHost;
@@ -1271,13 +1271,13 @@ class CONTENT_EXPORT RenderFrameImpl
   // local roots.
   DevToolsAgent* devtools_agent_;
 
-  // The push messaging dispatcher attached to this frame, lazily initialized.
-  PushMessagingDispatcher* push_messaging_dispatcher_;
-
   // The presentation dispatcher implementation attached to this frame, lazily
   // initialized.
   PresentationDispatcher* presentation_dispatcher_;
 
+  // The PushMessagingClient attached to this frame, lazily initialized.
+  PushMessagingClient* push_messaging_client_;
+
   std::unique_ptr<service_manager::InterfaceRegistry> interface_registry_;
   std::unique_ptr<service_manager::InterfaceProvider> remote_interfaces_;
   std::unique_ptr<BlinkInterfaceProviderImpl> blink_interface_provider_;