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

cc/trees/remote_channel_impl.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_impl.h"
 
 #include "base/bind_helpers.h"
 #include "base/memory/ptr_util.h"
 #include "base/single_thread_task_runner.h"
 #include "cc/animation/animation_events.h"
@@ skipping 279 matching lines @@
     ImplThreadTaskRunner()->PostTask(
         FROM_HERE, base::Bind(&RemoteChannelImpl::ShutdownImplOnImpl,
                               base::Unretained(this), &completion));
     completion.Wait();
   }
 
   main().started = false;
   main().remote_channel_weak_factory.InvalidateWeakPtrs();
 }
 
+void RemoteChannelImpl::SetMutator(std::unique_ptr<LayerTreeMutator> mutator) {
+  // TODO(vollick): add support for compositor worker.
+}
+
 bool RemoteChannelImpl::SupportsImplScrolling() const {
   return true;
 }
 
 void RemoteChannelImpl::UpdateTopControlsState(TopControlsState constraints,
                                                TopControlsState current,
                                                bool animate) {
   NOTREACHED() << "Should not be called on the remote client LayerTreeHost";
 }
 
@@ skipping 229 matching lines @@
 
 RemoteChannelImpl::CompositorThreadOnly::CompositorThreadOnly(
     base::WeakPtr<RemoteChannelImpl> remote_channel_weak_ptr)
     : proxy_impl(nullptr),
       proxy_impl_weak_factory(nullptr),
       remote_channel_weak_ptr(remote_channel_weak_ptr) {}
 
 RemoteChannelImpl::CompositorThreadOnly::~CompositorThreadOnly() {}
 
 }  // namespace cc