Add support for Rec709 color space videos in software YUV convert path.

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 928550cbd0724b2624f164970d8763e81f9207e6..cdfd6332885c62c4eddc2aef5bb754606f23d6c6 100644
--- a/media/base/video_frame.h
+++ b/media/base/video_frame.h
@@ -63,7 +63,8 @@ class MEDIA_EXPORT VideoFrame : public base::RefCountedThreadSafe<VideoFrame> {
     YV12J = 7,  // JPEG color range version of YV12
     NV12 = 8,  // 12bpp 1x1 Y plane followed by an interleaved 2x2 UV plane.
     YV24 = 9,  // 24bpp YUV planar, no subsampling.
-    FORMAT_MAX = YV24,  // Must always be equal to largest entry logged.
+    YV12HD = 10,  // Rec709 "HD" color space version of YV12

[rileya (GONE FROM CHROMIUM), 2014/09/29 18:15:14]

Is it worth making this another one-off, or is it about time to give VideoFrame
separate color space (maybe color range too) enums?

[scherkus (not reviewing), 2014/10/01 16:39:34]

I'm OK with this for now.

+    FORMAT_MAX = YV12HD,  // Must always be equal to largest entry logged.
   };
 
   // Returns the name of a Format as a string.