Use Mojo Permission Service when requesting Notifications permission.

content/child/notifications/notification_dispatcher.cc

Index: content/child/notifications/notification_dispatcher.cc
diff --git a/content/child/notifications/notification_dispatcher.cc b/content/child/notifications/notification_dispatcher.cc
index 9401903333dda9ce8d2c45aea5e9bf05e2c81ca6..25d6f42dd69352ba9f716354fab608c0ede7c594 100644
--- a/content/child/notifications/notification_dispatcher.cc
+++ b/content/child/notifications/notification_dispatcher.cc
@@ -29,9 +29,6 @@ int NotificationDispatcher::GenerateNotificationId(int thread_id) {
 
 base::TaskRunner* NotificationDispatcher::OverrideTaskRunnerForMessage(
     const IPC::Message& msg) {
-  if (!ShouldHandleMessage(msg))
-    return NULL;
-
   int notification_id = -1,
       thread_id = 0;
 
@@ -52,9 +49,6 @@ base::TaskRunner* NotificationDispatcher::OverrideTaskRunnerForMessage(
 }
 
 bool NotificationDispatcher::OnMessageReceived(const IPC::Message& msg) {
-  if (!ShouldHandleMessage(msg))
-    return false;
-
   NotificationManager::ThreadSpecificInstance(
       thread_safe_sender_.get(),
       main_thread_loop_proxy_.get(),
@@ -62,12 +56,4 @@ bool NotificationDispatcher::OnMessageReceived(const IPC::Message& msg) {
   return true;
 }
 
-bool NotificationDispatcher::ShouldHandleMessage(const IPC::Message& msg) {
-  // The thread-safe message filter is responsible for handling all the messages
-  // except for the routed permission-request-completed message, which will be
-  // picked up by the RenderFrameImpl instead.
-  return IPC_MESSAGE_CLASS(msg) == PlatformNotificationMsgStart &&
-         msg.type() != PlatformNotificationMsg_PermissionRequestComplete::ID;
-}
-
 }  // namespace content