media: Implement zero-copy video playback for VP8.

media/base/video_frame.h

Index: media/base/video_frame.h
diff --git a/media/base/video_frame.h b/media/base/video_frame.h
index 944a04018ca25c55a6fbd3d12e98b35374e35b77..dd925c9bd5c69a2152c1ac67a75fd8823b8f2801 100644
--- a/media/base/video_frame.h
+++ b/media/base/video_frame.h
@@ -149,6 +149,20 @@ class MEDIA_EXPORT VideoFrame : public base::RefCountedThreadSafe<VideoFrame> {
       const gfx::Size& natural_size,
       base::TimeDelta timestamp);
 
+  // Wraps a set of native textures representing YV12A data with a VideoFrame.
+  // |mailbox_holders_release_cb| will be called with a sync token as the
+  // argument when the VideoFrame is to be destroyed.
+  static scoped_refptr<VideoFrame> WrapYV12ANativeTextures(
+      const gpu::MailboxHolder& y_mailbox_holder,
+      const gpu::MailboxHolder& u_mailbox_holder,
+      const gpu::MailboxHolder& v_mailbox_holder,
+      const gpu::MailboxHolder& a_mailbox_holder,
+      const ReleaseMailboxCB& mailbox_holders_release_cb,
+      const gfx::Size& coded_size,
+      const gfx::Rect& visible_rect,
+      const gfx::Size& natural_size,
+      base::TimeDelta timestamp);
+
   // Wraps packed image data residing in a memory buffer with a VideoFrame.
   // The image data resides in |data| and is assumed to be packed tightly in a
   // buffer of logical dimensions |coded_size| with the appropriate bit depth