compositor-worker: cc->blink mutation plumbing

cc/trees/proxy_impl.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_impl.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 492 matching lines @@
 
 void ProxyImpl::ScheduledActionSendBeginMainFrame(const BeginFrameArgs& args) {
   DCHECK(IsImplThread());
   unsigned int begin_frame_id = nextBeginFrameId++;
   benchmark_instrumentation::ScopedBeginFrameTask begin_frame_task(
       benchmark_instrumentation::kSendBeginFrame, begin_frame_id);
   std::unique_ptr<BeginMainFrameAndCommitState> begin_main_frame_state(
       new BeginMainFrameAndCommitState);
   begin_main_frame_state->begin_frame_id = begin_frame_id;
   begin_main_frame_state->begin_frame_args = args;
+  begin_main_frame_state->begin_frame_callbacks =
+      layer_tree_host_impl_->ProcessLayerTreeMutations();
   begin_main_frame_state->scroll_info =
       layer_tree_host_impl_->ProcessScrollDeltas();
   begin_main_frame_state->memory_allocation_limit_bytes =
       layer_tree_host_impl_->memory_allocation_limit_bytes();
   begin_main_frame_state->evicted_ui_resources =
       layer_tree_host_impl_->EvictedUIResourcesExist();
   // TODO(vmpstr): This needs to be fixed if
   // main_frame_before_activation_enabled is set, since we might run this code
   // twice before recording a duration. crbug.com/469824
   last_begin_main_frame_args_ = begin_main_frame_state->begin_frame_args;
@@ skipping 159 matching lines @@
 bool ProxyImpl::IsMainThreadBlocked() const {
   return task_runner_provider_->IsMainThreadBlocked();
 }
 
 ProxyImpl::BlockedMainCommitOnly& ProxyImpl::blocked_main_commit() {
   DCHECK(IsMainThreadBlocked() && commit_completion_event_);
   return main_thread_blocked_commit_vars_unsafe_;
 }
 
 }  // namespace cc