Don't mark a WebMediaPlayer as idle until it has size and first frame.

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 8b777e350c3f852ef628d4628b0e93109b5598a8..be5fa48921bf8b2eda5641bc90d184e63625f21f 100644
--- a/media/blink/webmediaplayer_impl.cc
+++ b/media/blink/webmediaplayer_impl.cc
@@ -1024,6 +1024,11 @@ void WebMediaPlayerImpl::OnPipelineMetadata(
     if (delegate_ && delegate_->IsHidden())
       OnHidden(false);
   }
+
+  // Tell the delegate we can now be safely suspended due to inactivity if a
+  // subsequent play event does not occur.
+  if (paused_)
+    NotifyPlaybackPaused();
 }
 
 void WebMediaPlayerImpl::OnPipelineBufferingStateChanged(