Hook up EncodedVideoSource on the browser side

media/video/capture/video_capture_device_dummy.h

Index: media/video/capture/video_capture_device_dummy.h
diff --git a/media/video/capture/video_capture_device_dummy.h b/media/video/capture/video_capture_device_dummy.h
index 395a46b154e17dcb01e9ef33e11cdf0b57311ce1..f46ad2a1eac3cc6ea07767d3cdbf222e1786305c 100644
--- a/media/video/capture/video_capture_device_dummy.h
+++ b/media/video/capture/video_capture_device_dummy.h
@@ -19,6 +19,9 @@ namespace media {
 
 class VideoCaptureDeviceDummy : public VideoCaptureDevice {
  public:
+  virtual VideoEncodingCapability GetEncodingCapability() OVERRIDE;
+  virtual void TryConfigureEncodedBitstream(
+      const RuntimeVideoEncodingParameters& params) OVERRIDE;
   virtual void Allocate(int width, int height, int frame_rate,
                         VideoCaptureDevice::EventHandler* observer) OVERRIDE;
   virtual void Start() OVERRIDE;