workers: Introduce a WorkerMessageFilter to ease routing/processing worker messages.

content/child/push_messaging/push_provider.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_CHILD_PUSH_MESSAGING_PUSH_MANAGER_H_
 #define CONTENT_CHILD_PUSH_MESSAGING_PUSH_MANAGER_H_
 
 #include <string>
 
 #include "base/id_map.h"
 #include "base/memory/ref_counted.h"
 #include "content/child/push_messaging/push_dispatcher.h"
 #include "content/child/worker_task_runner.h"
+#include "content/public/common/push_messaging_status.h"
 #include "third_party/WebKit/public/platform/WebPushError.h"
 #include "third_party/WebKit/public/platform/WebPushProvider.h"
 
 class GURL;
 
 namespace content {
 
 class ThreadSafeSender;
 
 class PushProvider : public blink::WebPushProvider,
@@ skipping 61 matching lines @@
   // the callbacks.
   IDMap<blink::WebPushUnregisterCallbacks, IDMapOwnPointer>
       unregister_callbacks_;
 
   DISALLOW_COPY_AND_ASSIGN(PushProvider);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_PUSH_MESSAGING_PUSH_MANAGER_H_