Revert of Attach color space information to hardware decoded NV12 video frames.

media/gpu/vt_video_decode_accelerator_mac.cc

Index: media/gpu/vt_video_decode_accelerator_mac.cc
diff --git a/media/gpu/vt_video_decode_accelerator_mac.cc b/media/gpu/vt_video_decode_accelerator_mac.cc
index 92786bef49d9745729e40aaa556b74689e258356..61a34df2699c6aec8c11610bd5aeec0756b04fae 100644
--- a/media/gpu/vt_video_decode_accelerator_mac.cc
+++ b/media/gpu/vt_video_decode_accelerator_mac.cc
@@ -1105,10 +1105,8 @@
 
   DVLOG(3) << "PictureReady(picture_id=" << picture_id << ", "
            << "bitstream_id=" << frame.bitstream_id << ")";
-  // TODO(hubbe): Use the correct color space.  http://crbug.com/647725
   client_->PictureReady(Picture(picture_id, frame.bitstream_id,
-                                gfx::Rect(frame.image_size), gfx::ColorSpace(),
-                                true));
+                                gfx::Rect(frame.image_size), true));
   return true;
 }