Move MessagePort implementation from android_webview to content

android_webview/renderer/aw_message_port_client.h

-// Copyright 2015 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 ANDROID_WEBVIEW_RENDERER_AW_MESSAGE_PORT_CLIENT_H_
-#define ANDROID_WEBVIEW_RENDERER_AW_MESSAGE_PORT_CLIENT_H_
-
-#include <vector>
-
-#include "base/macros.h"
-#include "base/strings/string16.h"
-#include "content/public/renderer/render_frame_observer.h"
-
-namespace android_webview {
-
-// Renderer side of Android webview specific message port service. This service
-// is used to convert messages from WebSerializedScriptValue to a base value.
-class AwMessagePortClient : public content::RenderFrameObserver {
- public:
-  explicit AwMessagePortClient(content::RenderFrame* render_frame);
-
- private:
-  ~AwMessagePortClient() override;
-
-  // RenderFrameObserver
-  bool OnMessageReceived(const IPC::Message& message) override;
-  void OnDestruct() override;
-
-  void OnWebToAppMessage(int message_port_id,
-                         const base::string16& message,
-                         const std::vector<int>& sent_message_port_ids);
-  void OnAppToWebMessage(int message_port_id,
-                         const base::string16& message,
-                         const std::vector<int>& sent_message_port_ids);
-  void OnClosePort(int message_port_id);
-
-  DISALLOW_COPY_AND_ASSIGN(AwMessagePortClient);
-};
-
-}
-
-#endif  // ANDROID_WEBVIEW_RENDERER_AW_MESSAGE_PORT_CLIENT_H_