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

media/gpu/dxva_picture_buffer_win.h

Index: media/gpu/dxva_picture_buffer_win.h
diff --git a/media/gpu/dxva_picture_buffer_win.h b/media/gpu/dxva_picture_buffer_win.h
index da658a95fa079b267f8584646a4cf3bb46a4ed91..3c2d0c1d1f6b63349a5537d70a2bc6bbd404cb50 100644
--- a/media/gpu/dxva_picture_buffer_win.h
+++ b/media/gpu/dxva_picture_buffer_win.h
@@ -53,11 +53,6 @@
   gfx::Size size() const { return picture_buffer_.size(); }
   void set_bound();
 
-  const gfx::ColorSpace& color_space() const { return color_space_; }
-  void set_color_space(const gfx::ColorSpace& color_space) {
-    color_space_ = color_space;
-  }
-
   bool waiting_to_reuse() const { return state_ == WAITING_TO_REUSE; }
   virtual gl::GLFence* reuse_fence();
 
@@ -72,7 +67,6 @@
 
   State state_ = UNUSED;
   PictureBuffer picture_buffer_;
-  gfx::ColorSpace color_space_;
 
   DISALLOW_COPY_AND_ASSIGN(DXVAPictureBuffer);
 };