Support for YUV 4:4:4 subsampling.

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 a3f296dd548fb489e97f299355adda2c8107bfae..b4836b5012d0c1281d5b9f59b540cb0a4f369382 100644
--- a/media/base/video_frame.h
+++ b/media/base/video_frame.h
@@ -57,7 +57,8 @@ class MEDIA_EXPORT VideoFrame : public base::RefCountedThreadSafe<VideoFrame> {
     NATIVE_TEXTURE = 6,  // Native texture.  Pixel-format agnostic.
     YV12J = 7,  // JPEG color range version of YV12
     NV12 = 8,  // 12bpp 1x1 Y plane followed by an interleaved 2x2 UV plane.
-    FORMAT_MAX = NV12,  // Must always be equal to largest entry logged.
+    I444 = 9,  // 24bpp YUV planer, no subsampling.

[scherkus (not reviewing), 2014/05/22 23:45:11]

s/planer/planar/

it seems like we have I420 to represent U-V ordered planar data, which means
this should be YV24 to be consistent with our other V-U enums

[sandersd (OOO until July 31), 2014/05/23 00:45:22]

Works for me. (Although I did't find a code path where I420 and YV12 are handled
differently.)

+    FORMAT_MAX = I444,  // Must always be equal to largest entry logged.
   };
 
   // Returns the name of a Format as a string.