Add GetFrameConsumer() in VideoRenderer.

remoting/client/plugin/pepper_video_renderer_3d.cc

Index: remoting/client/plugin/pepper_video_renderer_3d.cc
diff --git a/remoting/client/plugin/pepper_video_renderer_3d.cc b/remoting/client/plugin/pepper_video_renderer_3d.cc
index 732b77b149fb049bc7b03081030b7764612f5d42..4c22b1439c6a824629c577d230bde08aef4a535b 100644
--- a/remoting/client/plugin/pepper_video_renderer_3d.cc
+++ b/remoting/client/plugin/pepper_video_renderer_3d.cc
@@ -178,6 +178,13 @@ protocol::VideoStub* PepperVideoRenderer3D::GetVideoStub() {
   return this;
 }
 
+protocol::FrameConsumer* PepperVideoRenderer3D::GetFrameConsumer() {
+  // GetFrameConsumer() is used only for WebRTC-based connections which are not
+  // supported by the plugin.
+  NOTREACHED();
+  return nullptr;
+}
+
 void PepperVideoRenderer3D::ProcessVideoPacket(scoped_ptr<VideoPacket> packet,
                                                const base::Closure& done) {
   base::ScopedClosureRunner done_runner(done);