Add CoreVideoFrameBuffer.

webrtc/common_video/include/video_frame_buffer.h

Index: webrtc/common_video/include/video_frame_buffer.h
diff --git a/webrtc/common_video/include/video_frame_buffer.h b/webrtc/common_video/include/video_frame_buffer.h
index 9cf57a43591b1da66f82ed9d59ffde5794fdc212..6973bb7ddc13dcc7bcf6fe4580d0882767f41581 100644
--- a/webrtc/common_video/include/video_frame_buffer.h
+++ b/webrtc/common_video/include/video_frame_buffer.h
@@ -13,6 +13,9 @@
 
 #include <stdint.h>
 
+#if defined(WEBRTC_MAC) || defined(WEBRTC_IOS)
+#include <CoreVideo/CoreVideo.h>
+#endif
 #include <memory>
 
 #include "webrtc/base/callback.h"
@@ -160,6 +163,21 @@ rtc::scoped_refptr<VideoFrameBuffer> ShallowCenterCrop(
     int cropped_width,
     int cropped_height);
 
+#if defined(WEBRTC_MAC) || defined(WEBRTC_IOS)

[pbos-webrtc, 2016/04/01 11:56:10]

This class should go into a separate header I think.

[tkchin_webrtc, 2016/04/01 16:09:29]

Done.

+
+class CoreVideoFrameBuffer : public NativeHandleBuffer {
+ public:
+  explicit CoreVideoFrameBuffer(CVPixelBufferRef pixel_buffer);
+  virtual ~CoreVideoFrameBuffer();
+
+  rtc::scoped_refptr<VideoFrameBuffer> NativeToI420Buffer() override;
+
+ private:
+  CVPixelBufferRef pixel_buffer_;
+};
+
+#endif  // defined(WEBRTC_MAC) || defined(WEBRTC_IOS)
+
 }  // namespace webrtc
 
 #endif  // WEBRTC_COMMON_VIDEO_INCLUDE_VIDEO_FRAME_BUFFER_H_