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..0696a554c8f8fc1ca38f237f4738e1d5014fd384 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.
+    YV24 = 9,  // 24bpp YUV planar, no subsampling.
+    FORMAT_MAX = YV24,  // Must always be equal to largest entry logged.
   };
 
   // Returns the name of a Format as a string.