Force the video to go fullscreen when setting persistent video

content/renderer/media/webmediaplayer_ms.cc

Index: content/renderer/media/webmediaplayer_ms.cc
diff --git a/content/renderer/media/webmediaplayer_ms.cc b/content/renderer/media/webmediaplayer_ms.cc
index d001d957dd608930dcb982388292f6a432a0c703..9b479146f8793c021bd8e25ab035cee0683c5702 100644
--- a/content/renderer/media/webmediaplayer_ms.cc
+++ b/content/renderer/media/webmediaplayer_ms.cc
@@ -570,6 +570,10 @@ void WebMediaPlayerMS::OnVolumeMultiplierUpdate(double multiplier) {
   // TODO(perkj, magjed): See TODO in OnPlay().
 }
 
+void WebMediaPlayerMS::OnBecamePersistentVideo(bool value) {
+  get_client()->onBecamePersistentVideo(value);
+}
+
 bool WebMediaPlayerMS::copyVideoTextureToPlatformTexture(
     gpu::gles2::GLES2Interface* gl,
     unsigned int texture,