Implement I420FrameCallbacks in Call.

BUG=2425
R=mflodman@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/2393004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5005 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/video_engine/vie_image_process_impl.h b/webrtc/video_engine/vie_image_process_impl.h
index 81e6b78..9b43e7e 100644
--- a/webrtc/video_engine/vie_image_process_impl.h
+++ b/webrtc/video_engine/vie_image_process_impl.h
@@ -38,6 +38,15 @@
   virtual int EnableDenoising(const int capture_id, const bool enable);
   virtual int EnableColorEnhancement(const int video_channel,
                                      const bool enable);
+  virtual void RegisterPreEncodeCallback(
+      int video_channel,
+      I420FrameCallback* pre_encode_callback) OVERRIDE;
+  virtual void DeRegisterPreEncodeCallback(int video_channel) OVERRIDE;
+
+  virtual void RegisterPreRenderCallback(
+      int video_channel,
+      I420FrameCallback* pre_render_callback) OVERRIDE;
+  virtual void DeRegisterPreRenderCallback(int video_channel) OVERRIDE;
 
  protected:
   explicit ViEImageProcessImpl(ViESharedData* shared_data);