Implement getMediaDevices.

content/browser/renderer_host/media/media_stream_manager.h

 // 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 file.
 
 // MediaStreamManager is used to open/enumerate media capture devices (video
 // supported now). Call flow:
 // 1. GenerateStream is called when a render process wants to use a capture
 //    device.
 // 2. MediaStreamManager will ask MediaStreamUIController for permission to
 //    use devices and for which device to use.
@@ skipping 110 matching lines @@
                         int render_view_id,
                         const std::string& device_id);
 
   // Gets a list of devices of |type|, which must be MEDIA_DEVICE_AUDIO_CAPTURE
   // or MEDIA_DEVICE_VIDEO_CAPTURE.
   // The request is identified using the string returned to the caller.
   // When the |requester| is NULL, MediaStreamManager will enumerate both audio
   // and video devices and also start monitoring device changes, such as
   // plug/unplug. The new device lists will be delivered via media observer to
   // MediaCaptureDevicesDispatcher.
+  // If |have_permission| is false, we remove the device label from the result.
   virtual std::string EnumerateDevices(MediaStreamRequester* requester,
                                        int render_process_id,
                                        int render_view_id,
                                        const ResourceContext::SaltCallback& sc,
                                        int page_request_id,
                                        MediaStreamType type,
-                                       const GURL& security_origin);
+                                       const GURL& security_origin,
+                                       bool have_permission);
 
   // Open a device identified by |device_id|.  |type| must be either
   // MEDIA_DEVICE_AUDIO_CAPTURE or MEDIA_DEVICE_VIDEO_CAPTURE.
   // The request is identified using string returned to the caller.
   void OpenDevice(MediaStreamRequester* requester,
                   int render_process_id,
                   int render_view_id,
                   const ResourceContext::SaltCallback& sc,
                   int page_request_id,
                   const std::string& device_id,
@@ skipping 233 matching lines @@
 
   bool use_fake_ui_;
   scoped_ptr<FakeMediaStreamUIProxy> fake_ui_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_MANAGER_H_