Send hardware video frames with mailboxes.

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 00f044443c4ba5658e48213d389a9cd73f2190af..fe753a1568cd4af8f9bd5c0289f21a4a3f3a336f 100644
--- a/content/renderer/media/android/webmediaplayer_android.h
+++ b/content/renderer/media/android/webmediaplayer_android.h
@@ -17,6 +17,7 @@
 #include "content/renderer/media/android/media_info_loader.h"
 #include "content/renderer/media/android/media_source_delegate.h"
 #include "content/renderer/media/android/stream_texture_factory_android.h"
+#include "gpu/command_buffer/common/mailbox.h"
 #include "media/base/android/media_player_android.h"
 #include "media/base/demuxer_stream.h"
 #include "media/base/media_keys.h"
@@ -332,6 +333,11 @@ class WebMediaPlayerAndroid
   // GL texture ID allocated to the video.
   unsigned int texture_id_;
 
+  // GL texture mailbox for texture_id_ to provide in the VideoFrame, and sync
+  // point for when the mailbox was produced.
+  gpu::Mailbox texture_mailbox_;
+  unsigned int texture_mailbox_sync_point_;
+
   // Stream texture ID allocated to the video.
   unsigned int stream_id_;