reland patch http://codereview.chromium.org/7204008 after webrtc build has been fixed.

BUG=none
TEST=try bots
Review URL: http://codereview.chromium.org/7458006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@93235 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/content/renderer/render_view.h b/content/renderer/render_view.h
index 34e2fa1c..43c1b66 100644
--- a/content/renderer/render_view.h
+++ b/content/renderer/render_view.h
@@ -57,6 +57,7 @@
 class GeolocationDispatcher;
 class GURL;
 class LoadProgressTracker;
+class MediaStreamImpl;
 class NavigationState;
 class NotificationProvider;
 class P2PSocketDispatcher;
@@ -1094,6 +1095,9 @@
   // Device orientation dispatcher attached to this view; lazily initialized.
   DeviceOrientationDispatcher* device_orientation_dispatcher_;
 
+  // MediaStreamImpl attached to this view; lazily initialized.
+  scoped_refptr<MediaStreamImpl> media_stream_impl_;
+
   // Handles accessibility requests into the renderer side, as well as
   // maintains the cache and other features of the accessibility tree.
   scoped_ptr<WebKit::WebAccessibilityCache> accessibility_;