compositor-worker: Initialize CW machinery plumbing to compositor and fire CW rAF callbacks.

cc/trees/remote_channel_main.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/remote_channel_main.h"
 
 #include <memory>
 
 #include "base/memory/ptr_util.h"
 #include "cc/proto/base_conversions.h"
@@ skipping 47 matching lines @@
 void RemoteChannelMain::UpdateTopControlsStateOnImpl(
     TopControlsState constraints,
     TopControlsState current,
     bool animate) {}
 
 void RemoteChannelMain::InitializeOutputSurfaceOnImpl(
     OutputSurface* output_surface) {
   NOTREACHED() << "Should not be called on the server LayerTreeHost";
 }
 
+void RemoteChannelMain::InitializeMutatorOnImpl(LayerTreeMutator* mutator) {
+  // TODO(vollick): add support for CompositorWorker.
+}
+
 void RemoteChannelMain::MainThreadHasStoppedFlingingOnImpl() {
   proto::CompositorMessage proto;
   proto::CompositorMessageToImpl* to_impl_proto = proto.mutable_to_impl();
   to_impl_proto->set_message_type(
       proto::CompositorMessageToImpl::MAIN_THREAD_HAS_STOPPED_FLINGING_ON_IMPL);
 
   SendMessageProto(proto);
 }
 
 void RemoteChannelMain::SetInputThrottledUntilCommitOnImpl(bool is_throttled) {}
@@ skipping 177 matching lines @@
 
 void RemoteChannelMain::DidCompleteSwapBuffers() {
   proxy_main_->DidCompleteSwapBuffers();
 }
 
 base::SingleThreadTaskRunner* RemoteChannelMain::MainThreadTaskRunner() const {
   return task_runner_provider_->MainThreadTaskRunner();
 }
 
 }  // namespace cc