compositor-worker: cc->blink mutation plumbing

cc/trees/layer_tree_host.cc

 // Copyright 2011 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/layer_tree_host.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 550 matching lines @@
 }
 
 bool LayerTreeHost::CommitRequested() const {
   return proxy_->CommitRequested();
 }
 
 bool LayerTreeHost::BeginMainFrameRequested() const {
   return proxy_->BeginMainFrameRequested();
 }
 
-
 void LayerTreeHost::SetNextCommitWaitsForActivation() {
   proxy_->SetNextCommitWaitsForActivation();
 }
 
 void LayerTreeHost::SetNextCommitForcesRedraw() {
   next_commit_forces_redraw_ = true;
   proxy_->SetNeedsUpdateLayers();
 }
 
 void LayerTreeHost::SetAnimationEvents(scoped_ptr<AnimationEvents> events) {
@@ skipping 327 matching lines @@
     // TODO(ccameron): pass the elastic overscroll here so that input events
     // may be translated appropriately.
     client_->ApplyViewportDeltas(
         inner_viewport_scroll_delta, outer_viewport_scroll_delta,
         info->elastic_overscroll_delta, info->page_scale_delta,
         info->top_controls_delta);
     SetNeedsUpdateLayers();
   }
 }
 
+void LayerTreeHost::ApplyMutations(LayerTreeMutations* mutations) {
+  if (mutations) {
+    TRACE_EVENT0("compositor-worker", "LayerTreeHost::ApplyMutations");
+    client_->ApplyMutations(*mutations);
+  }
+}
+
 void LayerTreeHost::SetDeviceScaleFactor(float device_scale_factor) {
   if (device_scale_factor == device_scale_factor_)
     return;
   device_scale_factor_ = device_scale_factor;
 
   property_trees_.needs_rebuild = true;
   SetNeedsCommit();
 }
 
 void LayerTreeHost::SetPaintedDeviceScaleFactor(
@@ skipping 507 matching lines @@
 
   // It is required to create new PropertyTrees before deserializing it.
   property_trees_ = PropertyTrees();
   property_trees_.FromProtobuf(proto.property_trees());
 
   surface_id_namespace_ = proto.surface_id_namespace();
   next_surface_sequence_ = proto.next_surface_sequence();
 }
 
 }  // namespace cc