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

media/blink/webmediaplayer_delegate.h

Index: media/blink/webmediaplayer_delegate.h
diff --git a/media/blink/webmediaplayer_delegate.h b/media/blink/webmediaplayer_delegate.h
index 7ae31df780b888b8248e41d92e5fd338a3c35e23..cfc3f678307f59f361aaae598dcc74801fcbcb05 100644
--- a/media/blink/webmediaplayer_delegate.h
+++ b/media/blink/webmediaplayer_delegate.h
@@ -43,7 +43,10 @@ class WebMediaPlayerDelegate {
                        bool is_remote,
                        base::TimeDelta duration) = 0;
 
-  // The specified player stopped playing media.
+  // The specified player stopped playing media. This may be called at any time
+  // with or without a DidPlay() having previously occurred. Calling this will
+  // cause the delegate to be registered for idle suspension. I.e., after some
+  // time elapses without a DidPlay(), OnSuspendRequested() will be issued.
   virtual void DidPause(int delegate_id, bool reached_end_of_stream) = 0;
 
   // The specified player was destroyed or suspended.  This may be called