Make MediaInternalsUI talk to MediaInternals.

chrome/browser/ui/webui/media_internals/media_internals_handler.h

+// Copyright (c) 2011 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 CHROME_BROWSER_UI_WEBUI_MEDIA_INTERNALS_MEDIA_INTERNALS_HANDLER_H_
+#define CHROME_BROWSER_UI_WEBUI_MEDIA_INTERNALS_MEDIA_INTERNALS_HANDLER_H_
+#pragma once
+
+#include "chrome/browser/ui/webui/chrome_web_ui.h"
+
+class MediaInternalsProxy;
+
+// This class handles messages to and from MediaInternalsUI.
+// It does all its work on the IO thread through the proxy below.
+class MediaInternalsMessageHandler : public WebUIMessageHandler {
+ public:
+  MediaInternalsMessageHandler();
+  virtual ~MediaInternalsMessageHandler();
+
+  // WebUIMessageHandler implementation.
+  virtual WebUIMessageHandler* Attach(WebUI* web_ui);
+  virtual void RegisterMessages();
+
+  // Javascript message handlers.
+  void OnGetEverything(const ListValue* list);
+
+  // MediaInternals message handlers.
+  void OnUpdate(const string16& update);
+
+ private:
+  scoped_refptr<MediaInternalsProxy> proxy_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaInternalsMessageHandler);
+};
+
+#endif  // CHROME_BROWSER_UI_WEBUI_MEDIA_INTERNALS_MEDIA_INTERNALS_HANDLER_H_