Tab Capture: Backing store readbacks to YV12 VideoFrames.

media/video/capture/video_capture_device.h

Index: media/video/capture/video_capture_device.h
diff --git a/media/video/capture/video_capture_device.h b/media/video/capture/video_capture_device.h
index fdfd8bea25b94fed9848241e5745323f8bdffd4a..d66c652397db96c875f2a5a3dcc73a59fd9eee38 100644
--- a/media/video/capture/video_capture_device.h
+++ b/media/video/capture/video_capture_device.h
@@ -36,15 +36,23 @@ class MEDIA_EXPORT VideoCaptureDevice {
 
   class MEDIA_EXPORT EventHandler {
    public:
-    // Captured a new video frame.
+    // Captured a new video frame as a raw buffer. The size, color format, and
+    // layout are taken from the parameters specified by an earlier call to
+    // OnFrameInfo. |data| must be packed, with no padding between rows and/or
+    // color planes.
     virtual void OnIncomingCapturedFrame(const uint8* data,
                                          int length,
                                          base::Time timestamp) = 0;
+    // Captured a new video frame, held in a VideoFrame container. |frame| must
+    // be allocated as RGB32, YV12 or I420, and the size must match that
+    // specified by an earlier call to OnFrameInfo.
+    virtual void OnIncomingCapturedVideoFrame(media::VideoFrame* frame,
+                                              base::Time timestamp) = 0;
     // An error has occurred that can not be handled
     // and VideoCaptureDevice must be DeAllocated.
     virtual void OnError() = 0;
     // Called when VideoCaptureDevice::Allocate has been called
-    // to inform of the resulting frame size and color format.
+    // to inform of the resulting frame size.
     virtual void OnFrameInfo(const VideoCaptureCapability& info) = 0;
 
    protected: