cc: make resource keep video buffer format for hardware overlay.

cc/resources/video_resource_updater.h

Index: cc/resources/video_resource_updater.h
diff --git a/cc/resources/video_resource_updater.h b/cc/resources/video_resource_updater.h
index 603b4a35d093cb7f526c64a5d4b9e2162accb173..360c24bb429ceaf8e91674ab4dbc7ba223325818 100644
--- a/cc/resources/video_resource_updater.h
+++ b/cc/resources/video_resource_updater.h
@@ -20,6 +20,7 @@
 #include "cc/resources/release_callback_impl.h"
 #include "cc/resources/resource_format.h"
 #include "cc/resources/texture_mailbox.h"
+#include "media/base/video_types.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace media {
@@ -49,6 +50,7 @@ class CC_EXPORT VideoFrameExternalResources {
   };
 
   ResourceType type;
+  media::VideoPixelFormat pixel_format;
   std::vector<TextureMailbox> mailboxes;
   std::vector<ReleaseCallbackImpl> release_callbacks;
   bool read_lock_fences_enabled;