Add flag in device enumeration request to control label clearing and don't clear for pepper.

content/renderer/media/media_stream_dispatcher.h

Index: content/renderer/media/media_stream_dispatcher.h
diff --git a/content/renderer/media/media_stream_dispatcher.h b/content/renderer/media/media_stream_dispatcher.h
index a52cb099d52501db3f92ba814428dedd2748e3ab..b7c666080fa4c47c9ddcc7969b3a46f25473a9ed 100644
--- a/content/renderer/media/media_stream_dispatcher.h
+++ b/content/renderer/media/media_stream_dispatcher.h
@@ -56,11 +56,15 @@ class CONTENT_EXPORT MediaStreamDispatcher
   virtual void StopStreamDevice(const StreamDeviceInfo& device_info);
 
   // Request to enumerate devices.
+  // If |hide_labels_if_no_access| is true, labels will be empty in the
+  // response if permission has not been granted for the device type. This
+  // should normally be true.
   virtual void EnumerateDevices(
       int request_id,
       const base::WeakPtr<MediaStreamDispatcherEventHandler>& event_handler,
       MediaStreamType type,
-      const GURL& security_origin);
+      const GURL& security_origin,
+      bool hide_labels_if_no_access);
 
   // Request to stop enumerating devices.
   void StopEnumerateDevices(