Move MessagePort implementation from android_webview to content

android_webview/browser/aw_message_port_service.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_BROWSER_AW_MESSAGE_PORT_SERVICE_H_
-#define ANDROID_WEBVIEW_BROWSER_AW_MESSAGE_PORT_SERVICE_H_
-
-#include <vector>
-
-#include "base/values.h"
-
-namespace android_webview {
-
-class AwMessagePortMessageFilter;
-
-// The interface for AwMessagePortService
-class AwMessagePortService  {
- public:
-  virtual ~AwMessagePortService() { }
-
-  virtual void OnConvertedWebToAppMessage(
-      int message_port_id,
-      const base::ListValue& message,
-      const std::vector<int>& sent_message_port_ids) = 0;
-
-  virtual void OnMessagePortMessageFilterClosing(
-      AwMessagePortMessageFilter* filter) = 0;
-
-  virtual void CleanupPort(int message_port_id) = 0;
-};
-
-}  // namespace android_webview
-
-#endif  // ANDROID_WEBVIEW_BROWSER_AW_MESSAGE_PORT_SERVICE_H_