Attach color space information to hardware decoded NV12 video frames.

media/gpu/dxva_video_decode_accelerator_win.h

Index: media/gpu/dxva_video_decode_accelerator_win.h
diff --git a/media/gpu/dxva_video_decode_accelerator_win.h b/media/gpu/dxva_video_decode_accelerator_win.h
index e44a71909e4808c3db4a0e28afbf11a8d38c0bfb..3142456057baa7b3848ad54f7f03fb4aa59cd3a7 100644
--- a/media/gpu/dxva_video_decode_accelerator_win.h
+++ b/media/gpu/dxva_video_decode_accelerator_win.h
@@ -36,6 +36,7 @@
 #include "media/gpu/gpu_video_decode_accelerator_helpers.h"
 #include "media/gpu/media_gpu_export.h"
 #include "media/video/video_decode_accelerator.h"
+#include "ui/gfx/color_space.h"
 
 interface IMFSample;
 interface IDirect3DSurface9;
@@ -73,6 +74,8 @@ class H264ConfigChangeDetector {
 
   bool config_changed() const { return config_changed_; }
 
+  gfx::ColorSpace current_color_space() const;
+
  private:
   // These fields are used to track the SPS/PPS in the H.264 bitstream and
   // are eventually compared against the SPS/PPS in the bitstream to detect