Tab Capture: Backing store readbacks to YV12 VideoFrames.

media/base/video_util.h

Index: media/base/video_util.h
diff --git a/media/base/video_util.h b/media/base/video_util.h
index 562ad7d86ccae39af852ae8d4ece09dba94a9889..fd71605394b8d7d277d0944b390efe80bdce6e62 100644
--- a/media/base/video_util.h
+++ b/media/base/video_util.h
@@ -28,6 +28,11 @@ MEDIA_EXPORT void CopyUPlane(const uint8* source, int stride, int rows,
                              VideoFrame* frame);
 MEDIA_EXPORT void CopyVPlane(const uint8* source, int stride, int rows,
                              VideoFrame* frame);
+// |plane| is one of VideoFrame::kYPlane, VideoFrame::kUPlane,
+// or VideoFrame::kVPlane.
+MEDIA_EXPORT void CopyPlane(size_t plane, const uint8* source, int stride,
+                            int rows, VideoFrame* frame);
+
 
 // Fills |frame| containing YUV data to the given color values.
 MEDIA_EXPORT void FillYUV(VideoFrame* frame, uint8 y, uint8 u, uint8 v);