Enable posting a message from JS to Android webview.

android_webview/renderer/aw_message_port_client.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 ANDROID_WEBVIEW_RENDERER_AW_MESSAGE_PORT_CLIENT_H_
+#define ANDROID_WEBVIEW_RENDERER_AW_MESSAGE_PORT_CLIENT_H_
+
+#include <vector>
+
+#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:
+  virtual ~AwMessagePortClient();
+
+  // RenderFrame::Observer

[mnaganov (inactive), 2015/01/07 11:43:54]

RenderFrameObserver

[sgurun-gerrit only, 2015/01/10 02:36:29]

Done.

+  bool OnMessageReceived(const IPC::Message& message) override;
+
+  void OnPostMessage(int message_port_id,
+                     const base::string16& message,
+                     const std::vector<int>& sent_message_port_ids);
+  DISALLOW_COPY_AND_ASSIGN(AwMessagePortClient);
+};
+
+}
+
+#endif  // ANDROID_WEBVIEW_RENDERER_AW_MESSAGE_PORT_CLIENT_H_