Refactor: Make MediaCaptureDevicesDispatcher have pluggable handlers.

chrome/browser/media/regular_media_access_handler.h

+// Copyright (c) 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 CHROME_BROWSER_MEDIA_REGULAR_MEDIA_ACCESS_HANDLER_H_
+#define CHROME_BROWSER_MEDIA_REGULAR_MEDIA_ACCESS_HANDLER_H_
+
+#include "chrome/browser/media/media_access_handler.h"
+
+class RegularMediaAccessHandler : public MediaAccessHandler {

[Sergey Ulanov, 2015/04/24 22:43:51]

This name is not very descriptive. Maybe call it
PermissionBubbleMediaAccessHandler?

[changbin, 2015/04/29 05:24:34]

Done.

+ public:
+  explicit RegularMediaAccessHandler(RequestsQueues& requests);
+  ~RegularMediaAccessHandler() override;
+
+  void HandleRequest(content::WebContents* web_contents,
+                     const content::MediaStreamRequest& request,
+                     const content::MediaResponseCallback& callback,
+                     const extensions::Extension* extension) override;
+
+ private:
+  void ProcessQueuedAccessRequest(content::WebContents* web_contents);
+  void OnAccessRequestResponse(content::WebContents* web_contents,
+                               const content::MediaStreamDevices& devices,
+                               content::MediaStreamRequestResult result,
+                               scoped_ptr<content::MediaStreamUI> ui);
+
+  RequestsQueues pending_requests_;
+};
+
+#endif  // CHROME_BROWSER_MEDIA_REGULAR_MEDIA_ACCESS_HANDLER_H_