Force the video to go fullscreen when setting persistent video

media/blink/webmediaplayer_impl_unittest.cc

Index: media/blink/webmediaplayer_impl_unittest.cc
diff --git a/media/blink/webmediaplayer_impl_unittest.cc b/media/blink/webmediaplayer_impl_unittest.cc
index a040b028883574d7dba456ebc164b6016ab33dbf..5dc3d306a462df3df7b18d684d6ebc6b92ca7201 100644
--- a/media/blink/webmediaplayer_impl_unittest.cc
+++ b/media/blink/webmediaplayer_impl_unittest.cc
@@ -89,6 +89,7 @@ class DummyWebMediaPlayerClient : public blink::WebMediaPlayerClient {
   void disconnectedFromRemoteDevice() override {}
   void cancelledRemotePlaybackRequest() override {}
   void remotePlaybackStarted() override {}
+  void onBecamePersistentVideo(bool) override {}
   bool isAutoplayingMuted() override { return is_autoplaying_muted_; }
   void requestReload(const blink::WebURL& newUrl) override {}
   bool hasSelectedVideoTrack() override { return false; }