Add video-rendering to mojo media pipeline.

media/base/pipeline_impl.cc

Index: media/base/pipeline_impl.cc
diff --git a/media/base/pipeline_impl.cc b/media/base/pipeline_impl.cc
index 5f4705b5d2639c6b4b2dd65bceacc72178d26d9c..2c9d6e8d0c2fc2b35e665dbf1c8a452b7fd8cc6d 100644
--- a/media/base/pipeline_impl.cc
+++ b/media/base/pipeline_impl.cc
@@ -68,6 +68,7 @@ void PipelineImpl::Start(Demuxer* demuxer,
                          const PipelineStatusCB& seek_cb,
                          const PipelineMetadataCB& metadata_cb,
                          const BufferingStateCB& buffering_state_cb,
+                         const NaturalSizeChangedCB& natural_size_changed_cb,
                          const base::Closure& duration_change_cb,
                          const AddTextTrackCB& add_text_track_cb,
                          const base::Closure& waiting_for_decryption_key_cb) {
@@ -88,6 +89,7 @@ void PipelineImpl::Start(Demuxer* demuxer,
   seek_cb_ = seek_cb;
   metadata_cb_ = metadata_cb;
   buffering_state_cb_ = buffering_state_cb;
+  natural_size_changed_cb_ = natural_size_changed_cb;
   duration_change_cb_ = duration_change_cb;
   add_text_track_cb_ = add_text_track_cb;
   waiting_for_decryption_key_cb_ = waiting_for_decryption_key_cb;
@@ -842,6 +844,7 @@ void PipelineImpl::InitializeRenderer(const PipelineStatusCB& done_cb) {
       demuxer_, done_cb,
       base::Bind(&PipelineImpl::OnUpdateStatistics, weak_this_),
       base::Bind(&PipelineImpl::BufferingStateChanged, weak_this_),
+      base::Bind(&PipelineImpl::OnNaturalSizeChanged, weak_this_),
       base::Bind(&PipelineImpl::OnRendererEnded, weak_this_),
       base::Bind(&PipelineImpl::OnError, weak_this_),
       waiting_for_decryption_key_cb_);
@@ -869,4 +872,10 @@ void PipelineImpl::BufferingStateChanged(BufferingState new_buffering_state) {
   buffering_state_cb_.Run(new_buffering_state);
 }
 
+void PipelineImpl::OnNaturalSizeChanged(const gfx::Size& size) {
+  DVLOG(1) << __FUNCTION__ << "(" << size.ToString() << ")";
+  DCHECK(task_runner_->BelongsToCurrentThread());
+  natural_size_changed_cb_.Run(size);
+}
+
 }  // namespace media