Prime the landing pad for the new video rendering pipeline.

media/mojo/services/renderer_config_default.cc

Index: media/mojo/services/renderer_config_default.cc
diff --git a/media/mojo/services/renderer_config_default.cc b/media/mojo/services/renderer_config_default.cc
index 66464a9a61ee6ad199ff1fc8c2107ac77af1c5bd..7cee1a7ac6c35531d6c88d583970f96b2c872888 100644
--- a/media/mojo/services/renderer_config_default.cc
+++ b/media/mojo/services/renderer_config_default.cc
@@ -24,6 +24,20 @@
 namespace media {
 namespace internal {
 
+class DummyVideoRendererSink : public VideoRendererSink {
+ public:
+  DummyVideoRendererSink() {}
+  ~DummyVideoRendererSink() override {}
+
+  void Start(RenderCallback* callback) override {}
+  void Stop() override {}
+  void PaintFrameUsingOldRenderingPath(
+      const scoped_refptr<VideoFrame>& frame) override {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DummyVideoRendererSink);
+};
+
 class DefaultRendererConfig : public PlatformRendererConfig {
  public:
   DefaultRendererConfig() {
@@ -87,6 +101,10 @@ class DefaultRendererConfig : public PlatformRendererConfig {
     return new AudioOutputStreamSink();
   }
 
+  scoped_ptr<VideoRendererSink> GetVideoRendererSink() override {
+    return make_scoped_ptr(new DummyVideoRendererSink());
+  }
+
   const AudioHardwareConfig& GetAudioHardwareConfig() override {
     return *audio_hardware_config_;
   }