Let clients interact with VideoCaptureDeviceClient instead of VideoCaptureDevice

media/capture/video/video_capture_buffer_handle.h

Index: media/capture/video/video_capture_buffer_handle.h
diff --git a/media/capture/video/video_capture_buffer_handle.h b/media/capture/video/video_capture_buffer_handle.h
index d9c4cc62f603909c35ebc346f9518f5f2c6ed8fd..fa77b5547706d30f55077cbd03ece8204574db81 100644
--- a/media/capture/video/video_capture_buffer_handle.h
+++ b/media/capture/video/video_capture_buffer_handle.h
@@ -6,6 +6,7 @@
 #define MEDIA_CAPTURE_VIDEO_VIDEO_CAPTURE_BUFFER_HANDLE_H_
 
 #include "base/files/file.h"
+#include "media/base/video_frame.h"
 #include "media/capture/capture_export.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/gpu_memory_buffer.h"
@@ -23,6 +24,8 @@ class CAPTURE_EXPORT VideoCaptureBufferHandle {
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
   virtual base::FileDescriptor AsPlatformFile() = 0;
 #endif
+  virtual bool IsBackedByVideoFrame() const = 0;
+  virtual scoped_refptr<VideoFrame> GetVideoFrame() = 0;
 };
 
 }  // namespace media