Dispatch push event to worker from PushServiceImpl#OnMessage.

chrome/browser/services/gcm/push_messaging_service_impl.h

Index: chrome/browser/services/gcm/push_messaging_service_impl.h
diff --git a/chrome/browser/services/gcm/push_messaging_service_impl.h b/chrome/browser/services/gcm/push_messaging_service_impl.h
index 5a8c1c296e750cb5e501a134d80cb7a8db5c67fa..026deb71043ab43eaa53f221029cc82734f0be10 100644
--- a/chrome/browser/services/gcm/push_messaging_service_impl.h
+++ b/chrome/browser/services/gcm/push_messaging_service_impl.h
@@ -57,6 +57,10 @@ class PushMessagingServiceImpl : public content::PushMessagingService,
       const content::PushMessagingService::RegisterCallback& callback) OVERRIDE;
 
  private:
+  void DeliverMessageCallback(const PushMessagingApplicationId& application_id,
+                              const GCMClient::IncomingMessage& message,
+                              content::PushMessagingStatus status);
+
   void RegisterEnd(
       const content::PushMessagingService::RegisterCallback& callback,
       const std::string& registration_id,