Componentize html_viewer's MessagePort

components/html_viewer/web_message_port_channel_impl.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 COMPONENTS_HTML_VIEWER_WEB_MESSAGE_PORT_CHANNEL_IMPL_H_
-#define COMPONENTS_HTML_VIEWER_WEB_MESSAGE_PORT_CHANNEL_IMPL_H_
-
-#include "base/basictypes.h"
-#include "mojo/common/handle_watcher.h"
-#include "third_party/WebKit/public/platform/WebMessagePortChannel.h"
-#include "third_party/mojo/src/mojo/public/cpp/system/message_pipe.h"
-
-namespace html_viewer {
-
-class WebMessagePortChannelImpl : public blink::WebMessagePortChannel {
- public:
-  static void CreatePair(
-      blink::WebMessagePortChannel** channel1,
-      blink::WebMessagePortChannel** channel2);
-
- private:
-  explicit WebMessagePortChannelImpl(mojo::ScopedMessagePipeHandle pipe);
-  virtual ~WebMessagePortChannelImpl();
-
-  // blink::WebMessagePortChannel implementation.
-  virtual void setClient(blink::WebMessagePortChannelClient* client);
-  virtual void destroy();
-  virtual void postMessage(const blink::WebString& message,
-                           blink::WebMessagePortChannelArray* channels);
-  virtual bool tryGetMessage(blink::WebString* message,
-                             blink::WebMessagePortChannelArray& channels);
-
-  void WaitForNextMessage();
-  void OnMessageAvailable(MojoResult result);
-
-  blink::WebMessagePortChannelClient* client_;
-  mojo::ScopedMessagePipeHandle pipe_;
-  mojo::common::HandleWatcher handle_watcher_;
-
-  DISALLOW_COPY_AND_ASSIGN(WebMessagePortChannelImpl);
-};
-
-}  // namespace html_viewer
-
-#endif  // COMPONENTS_HTML_VIEWER_WEB_MESSAGE_PORT_CHANNEL_IMPL_H_