Video Capture: extract storage info from pixel format in VideoCaptureFormat.

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 72aac2e680177a7df024e87e2c6bc2995ffc95a1..42cdd1d531322ea2466b7c1c61317132bb33346c 100644
--- a/media/video/capture/video_capture_device.h
+++ b/media/video/capture/video_capture_device.h
@@ -246,8 +246,9 @@ class MEDIA_EXPORT VideoCaptureDevice {
     // The output buffer stays reserved and mapped for use until the Buffer
     // object is destroyed or returned.
     virtual scoped_ptr<Buffer> ReserveOutputBuffer(
-        media::VideoPixelFormat format,
-        const gfx::Size& dimensions) = 0;
+        const gfx::Size& dimensions,
+        VideoPixelFormat format,
+        VideoPixelStorage storage) = 0;
 
     // Captured new video data, held in |frame| or |buffer|, respectively for
     // OnIncomingCapturedVideoFrame() and  OnIncomingCapturedBuffer().