[Cast for ATV] Enable UMP on Cast for ATV

media/blink/webmediaplayer_impl.cc

Index: media/blink/webmediaplayer_impl.cc
diff --git a/media/blink/webmediaplayer_impl.cc b/media/blink/webmediaplayer_impl.cc
index c0cdfcc5c25245dd8da65c0ec0c301947fcd5b88..d72afce51717f7f39536a3ea236aa0e26cccf0c2 100644
--- a/media/blink/webmediaplayer_impl.cc
+++ b/media/blink/webmediaplayer_impl.cc
@@ -1329,6 +1329,11 @@ void WebMediaPlayerImpl::OnSurfaceRequested(
 }
 
 std::unique_ptr<Renderer> WebMediaPlayerImpl::CreateRenderer() {
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kForceMediaPlayerStartingInFullscreenMode)) {
+    enteredFullscreen();

[liberato (no reviews please), 2016/07/14 16:26:58]

what happens if blink really does enter / exit full screen later?

we probably want enter/exit full screen to do nothing in those cases.

[AndyWu, 2016/07/14 19:02:08]

Done.
Doing nothing in enter/exit full screen is not going to help much if blink
enables this flag by accident. Because the position/size of the video hole in
graphic surface would not match that of video surface.

+  }
+
   RequestSurfaceCB request_surface_cb;
 #if defined(OS_ANDROID)
   request_surface_cb =