Make cricket::VideoCapturer implement VideoSourceInterface

webrtc/media/base/videosinkinterface.h

Index: webrtc/media/base/videosinkinterface.h
diff --git a/webrtc/media/base/videosinkinterface.h b/webrtc/media/base/videosinkinterface.h
index 9b8ba318623e6b43b2db726f7f84f099f956de34..a4df749edf938feaf58a4b33c29ccec0ab465e8d 100644
--- a/webrtc/media/base/videosinkinterface.h
+++ b/webrtc/media/base/videosinkinterface.h
@@ -13,13 +13,22 @@
 
 namespace rtc {
 
+struct VideoSinkCapabilities {
+  bool equals(const VideoSinkCapabilities& rh) const {
+    return can_apply_rotation == rh.can_apply_rotation;
+  }

[pthatcher1, 2016/02/03 15:38:36]

Why not use operator== ?

[perkj_webrtc, 2016/02/08 14:32:01]

because of style guide rules. But I think that is a stupid rule...

+
+  // Tells the source whether the sink can handle rotation. By default, the
+  // rotation is applied by the source and the generated frame is up right.
+  bool can_apply_rotation = false;
+};
+
 template <typename VideoFrameT>
 class VideoSinkInterface {
  public:
   virtual void OnFrame(const VideoFrameT& frame) = 0;
-
  protected:
-  ~VideoSinkInterface() {}
+  virtual ~VideoSinkInterface() {}
 };
 
 }  // namespace rtc