Convert push_messaging IPC msgs into mojo interfaces

content/child/push_messaging/push_dispatcher.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_DISPATCHER_H_
-#define CONTENT_CHILD_PUSH_MESSAGING_PUSH_DISPATCHER_H_
-
-#include <map>
-
-#include "base/macros.h"
-#include "base/synchronization/lock.h"
-#include "content/child/worker_thread_message_filter.h"
-
-namespace content {
-
-class PushDispatcher : public WorkerThreadMessageFilter {
- public:
-  explicit PushDispatcher(ThreadSafeSender* thread_safe_sender);
-
-  // Generates a process-unique new request id. Stores it in a map as key to
-  // |thread_id| and returns it. This method can be called on any thread.
-  // Note that the registration requests from document contexts do not go via
-  // this class and their request ids may overlap with the ones generated here.
-  int GenerateRequestId(int thread_id);
-
- protected:
-  ~PushDispatcher() override;
-
- private:
-  // WorkerThreadMessageFilter:
-  bool ShouldHandleMessage(const IPC::Message& msg) const override;
-  void OnFilteredMessageReceived(const IPC::Message& msg) override;
-  bool GetWorkerThreadIdForMessage(const IPC::Message& msg,
-                                   int* ipc_thread_id) override;
-
-  base::Lock request_id_map_lock_;
-  std::map<int, int> request_id_map_;  // Maps request id to thread id.
-  int next_request_id_;
-
-  DISALLOW_COPY_AND_ASSIGN(PushDispatcher);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_CHILD_PUSH_MESSAGING_PUSH_DISPATCHER_H_