Enable navigator.webkitGetUserMedia()

The code came from chrome/browser/media, but was simplified to remove
dependencies on other parts of chrome/ and to always allow the media stream
request.

brightray/browser/media/media_stream_devices_controller.h

@@ -0,0 +1,46 @@
+// Copyright (c) 2012 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-CHROMIUM file.
+
+#ifndef BRIGHTRAY_BROWSER_MEDIA_MEDIA_STREAM_DEVICES_CONTROLLER_H_
+#define BRIGHTRAY_BROWSER_MEDIA_MEDIA_STREAM_DEVICES_CONTROLLER_H_
+
+#include "content/public/browser/web_contents_delegate.h"
+
+namespace brightray {
+
+class MediaStreamDevicesController {
+ public:
+  MediaStreamDevicesController(const content::MediaStreamRequest& request,
+                               const content::MediaResponseCallback& callback);
+
+  virtual ~MediaStreamDevicesController();
+
+  // Public method to be called before creating the MediaStreamInfoBarDelegate.
+  // This function will check the content settings exceptions and take the
+  // corresponding action on exception which matches the request.
+  bool TakeAction();
+
+  // Public methods to be called by MediaStreamInfoBarDelegate;
+  bool has_audio() const { return microphone_requested_; }
+  bool has_video() const { return webcam_requested_; }
+  void Accept();
+  void Deny();
+
+ private:
+  // The original request for access to devices.
+  const content::MediaStreamRequest request_;
+
+  // The callback that needs to be Run to notify WebRTC of whether access to
+  // audio/video devices was granted or not.
+  content::MediaResponseCallback callback_;
+
+  bool microphone_requested_;
+  bool webcam_requested_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaStreamDevicesController);
+};
+
+}  // namespace atom
+
+#endif  // BRIGHTRAY_BROWSER_MEDIA_MEDIA_STREAM_DEVICES_CONTROLLER_H_