Prime the landing pad for the new video rendering pipeline.

media/mojo/services/mojo_renderer_impl.cc

Index: media/mojo/services/mojo_renderer_impl.cc
diff --git a/media/mojo/services/mojo_renderer_impl.cc b/media/mojo/services/mojo_renderer_impl.cc
index e4a133261579296415cda12d4a304d653473c79c..d1b41a6dd2257703d7750a36cfef45f28609be4c 100644
--- a/media/mojo/services/mojo_renderer_impl.cc
+++ b/media/mojo/services/mojo_renderer_impl.cc
@@ -33,14 +33,12 @@ MojoRendererImpl::~MojoRendererImpl() {
   // Connection to |remote_media_renderer_| will error-out here.
 }
 
-// TODO(xhwang): Support |paint_cb| and |waiting_for_decryption_key_cb|,
-// if needed.
+// TODO(xhwang): Support |waiting_for_decryption_key_cb| if needed.
 void MojoRendererImpl::Initialize(
     DemuxerStreamProvider* demuxer_stream_provider,
     const PipelineStatusCB& init_cb,
     const StatisticsCB& statistics_cb,
     const BufferingStateCB& buffering_state_cb,
-    const PaintCB& /* paint_cb */,
     const base::Closure& ended_cb,
     const PipelineStatusCB& error_cb,
     const base::Closure& /* waiting_for_decryption_key_cb */) {