Force the video to go fullscreen when setting persistent video

content/renderer/media/renderer_webmediaplayer_delegate.cc

Index: content/renderer/media/renderer_webmediaplayer_delegate.cc
diff --git a/content/renderer/media/renderer_webmediaplayer_delegate.cc b/content/renderer/media/renderer_webmediaplayer_delegate.cc
index be488cea14c58eec7d8a39555a25a74bbe56f7b3..08b4e709f4684ad4e36c4572b38fb043b02fd677 100644
--- a/content/renderer/media/renderer_webmediaplayer_delegate.cc
+++ b/content/renderer/media/renderer_webmediaplayer_delegate.cc
@@ -199,6 +199,8 @@ bool RendererWebMediaPlayerDelegate::OnMessageReceived(
                         OnMediaDelegateSuspendAllMediaPlayers)
     IPC_MESSAGE_HANDLER(MediaPlayerDelegateMsg_UpdateVolumeMultiplier,
                         OnMediaDelegateVolumeMultiplierUpdate)
+    IPC_MESSAGE_HANDLER(MediaPlayerDelegateMsg_BecamePersistentVideo,
+                        OnMediaDelegateBecamePersistentVideo)
     IPC_MESSAGE_UNHANDLED(return false)
   IPC_END_MESSAGE_MAP()
   return true;
@@ -273,6 +275,14 @@ void RendererWebMediaPlayerDelegate::OnMediaDelegateVolumeMultiplierUpdate(
     observer->OnVolumeMultiplierUpdate(multiplier);
 }
 
+void RendererWebMediaPlayerDelegate::OnMediaDelegateBecamePersistentVideo(
+    int player_id,
+    bool value) {
+  Observer* observer = id_map_.Lookup(player_id);
+  if (observer)
+    observer->OnBecamePersistentVideo(value);
+}
+
 void RendererWebMediaPlayerDelegate::ScheduleUpdateTask() {
   if (!pending_update_task_) {
     base::ThreadTaskRunnerHandle::Get()->PostTask(