[Video] MediaSession API event handlers can resume background video.

content/renderer/media/android/webmediaplayer_android.h

Index: content/renderer/media/android/webmediaplayer_android.h
diff --git a/content/renderer/media/android/webmediaplayer_android.h b/content/renderer/media/android/webmediaplayer_android.h
index 10c095c47913125fb12919c0aff309be2d3a6b98..b57de98555fbe117df365064710bf91d1a444d76 100644
--- a/content/renderer/media/android/webmediaplayer_android.h
+++ b/content/renderer/media/android/webmediaplayer_android.h
@@ -423,6 +423,10 @@ class WebMediaPlayerAndroid
   double volume_;
   double volume_multiplier_;
 
+  // Whether the video requires a user gesture to resume after it was paused in
+  // the background.
+  bool video_locked_when_paused_when_hidden_;
+
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<WebMediaPlayerAndroid> weak_factory_;