Send hardware video frames with mailboxes.

cc/layers/video_layer_impl.h

Index: cc/layers/video_layer_impl.h
diff --git a/cc/layers/video_layer_impl.h b/cc/layers/video_layer_impl.h
index b272f8f621accb063941e4079aaea26dfa248e12..72552ca48f282fe743e611eb65f3f83d6c2b45cf 100644
--- a/cc/layers/video_layer_impl.h
+++ b/cc/layers/video_layer_impl.h
@@ -5,6 +5,8 @@
 #ifndef CC_LAYERS_VIDEO_LAYER_IMPL_H_
 #define CC_LAYERS_VIDEO_LAYER_IMPL_H_
 
+#include <vector>
+
 #include "cc/base/cc_export.h"
 #include "cc/layers/layer_impl.h"
 #include "cc/resources/video_resource_updater.h"
@@ -53,6 +55,10 @@ class CC_EXPORT VideoLayerImpl : public LayerImpl {
   VideoFrameExternalResources::ResourceType frame_resource_type_;
   std::vector<ResourceProvider::ResourceId> frame_resources_;
 
+  // TODO(danakj): Remove this when hardware frames come through a mailbox.
+  unsigned hardware_resource_;
+  TextureMailbox::ReleaseCallback hardware_release_callback_;
+
   // TODO(danakj): Remove these, hide software path inside ResourceProvider and
   // ExternalResource (aka TextureMailbox) classes.
   std::vector<unsigned> software_resources_;