WIP - compositor worker mega patch.

cc/trees/proxy_main.cc

 // 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.
 
 #include "cc/trees/proxy_main.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/trace_event/trace_event.h"
@@ skipping 157 matching lines @@
         CommitEarlyOutReason::ABORTED_OUTPUT_SURFACE_LOST,
         begin_main_frame_start_time);
     return;
   }
 
   current_pipeline_stage_ = ANIMATE_PIPELINE_STAGE;
 
   layer_tree_host_->ApplyScrollAndScale(
       begin_main_frame_state->scroll_info.get());
 
+  layer_tree_host_->ApplyMutations(
+      begin_main_frame_state->mutations.get());
+
   layer_tree_host_->WillBeginMainFrame();
 
   layer_tree_host_->BeginMainFrame(begin_main_frame_state->begin_frame_args);
   layer_tree_host_->AnimateLayers(
       begin_main_frame_state->begin_frame_args.frame_time);
 
   // Recreate all UI resources if there were evicted UI resources when the impl
   // thread initiated the commit.
   if (begin_main_frame_state->evicted_ui_resources)
     layer_tree_host_->RecreateUIResources();
@@ skipping 206 matching lines @@
   TRACE_EVENT0("cc", "ProxyMain::Stop");
   DCHECK(IsMainThread());
   DCHECK(started_);
 
   channel_main_->SynchronouslyCloseImpl();
 
   layer_tree_host_ = nullptr;
   started_ = false;
 }
 
+void ProxyMain::SetMutator(LayerTreeMutator* mutator) {
+  TRACE_EVENT0("compositor-worker", "ThreadProxy::SetMutator");
+  channel_main_->InitializeMutatorOnImpl(mutator);
+}
+
 bool ProxyMain::SupportsImplScrolling() const {
   return true;
 }
 
 bool ProxyMain::MainFrameWillHappenForTesting() {
   DCHECK(IsMainThread());
   bool main_frame_will_happen = false;
   {
     DebugScopedSetMainThreadBlocked main_thread_blocked(task_runner_provider_);
     CompletionEvent completion;
@@ skipping 40 matching lines @@
     return false;
   channel_main_->SetNeedsCommitOnImpl();
   return true;
 }
 
 bool ProxyMain::IsMainThread() const {
   return task_runner_provider_->IsMainThread();
 }
 
 }  // namespace cc