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

cc/trees/proxy_main.h

 // Copyright 2015 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.
 
 #ifndef CC_TREES_PROXY_MAIN_H_
 #define CC_TREES_PROXY_MAIN_H_
 
 #include "base/macros.h"
 #include "cc/base/cc_export.h"
 #include "cc/debug/frame_timing_tracker.h"
 #include "cc/input/top_controls_state.h"
 #include "cc/output/output_surface.h"
 #include "cc/output/renderer_capabilities.h"
 #include "cc/trees/channel_main.h"
 #include "cc/trees/proxy.h"
 #include "cc/trees/proxy_common.h"
 #include "cc/trees/remote_proto_channel.h"
 
 namespace cc {
 
 class AnimationEvents;
 class BeginFrameSource;
 class ChannelMain;
 class LayerTreeHost;
+class LayerTreeMutator;
 
 // This class aggregates all interactions that the impl side of the compositor
 // needs to have with the main side.
 // The class is created and lives on the main thread.
 class CC_EXPORT ProxyMain : public Proxy {
  public:
   static std::unique_ptr<ProxyMain> CreateThreaded(
       LayerTreeHost* layer_tree_host,
       TaskRunnerProvider* task_runner_provider);
 
@@ skipping 66 matching lines @@
   void SetNextCommitWaitsForActivation() override;
   void NotifyInputThrottledUntilCommit() override;
   void SetDeferCommits(bool defer_commits) override;
   bool CommitRequested() const override;
   bool BeginMainFrameRequested() const override;
   void MainThreadHasStoppedFlinging() override;
   void Start(
       std::unique_ptr<BeginFrameSource> external_begin_frame_source) override;
   void Stop() override;
   bool SupportsImplScrolling() const override;
+  void SetMutator(std::unique_ptr<LayerTreeMutator> mutator) override;
   bool MainFrameWillHappenForTesting() override;
   void SetChildrenNeedBeginFrames(bool children_need_begin_frames) override;
   void SetAuthoritativeVSyncInterval(const base::TimeDelta& interval) override;
   void ReleaseOutputSurface() override;
   void UpdateTopControlsState(TopControlsState constraints,
                               TopControlsState current,
                               bool animate) override;
   void SetOutputIsSecure(bool output_is_secure) override;
 
   // This sets the channel used by ProxyMain to communicate with ProxyImpl.
@@ skipping 32 matching lines @@
   RendererCapabilities renderer_capabilities_;
 
   std::unique_ptr<ChannelMain> channel_main_;
 
   DISALLOW_COPY_AND_ASSIGN(ProxyMain);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_PROXY_MAIN_H_