Implement getMediaDevices.

content/browser/renderer_host/media/media_stream_manager.h

Index: content/browser/renderer_host/media/media_stream_manager.h
diff --git a/content/browser/renderer_host/media/media_stream_manager.h b/content/browser/renderer_host/media/media_stream_manager.h
index 2d0a56f192fa656e46d739d8ba02b981ad3b45c5..e437a8286670c5867862bd6b614623de51a2097a 100644
--- a/content/browser/renderer_host/media/media_stream_manager.h
+++ b/content/browser/renderer_host/media/media_stream_manager.h
@@ -128,13 +128,15 @@ class CONTENT_EXPORT MediaStreamManager
   // 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.