Refactor MutatorHostClient from LayerTreeHost to LayerTree.

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 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 "content/renderer/gpu/render_widget_compositor.h"
 
 #include <stddef.h>
 #include <limits>
 #include <string>
 #include <utility>
@@ skipping 672 matching lines @@
   layer_tree_host_->SetRootLayer(
       static_cast<const cc_blink::WebLayerImpl*>(&layer)->layer());
 }
 
 void RenderWidgetCompositor::clearRootLayer() {
   layer_tree_host_->SetRootLayer(scoped_refptr<cc::Layer>());
 }
 
 void RenderWidgetCompositor::attachCompositorAnimationTimeline(
     cc::AnimationTimeline* compositor_timeline) {
-  DCHECK(layer_tree_host_->animation_host());
-  layer_tree_host_->animation_host()->AddAnimationTimeline(compositor_timeline);
+  cc::AnimationHost* animation_host = layer_tree_host_->GetLayerTree()
+      ->animation_host();
+  DCHECK(animation_host);
+  animation_host->AddAnimationTimeline(compositor_timeline);
 }
 
 void RenderWidgetCompositor::detachCompositorAnimationTimeline(
     cc::AnimationTimeline* compositor_timeline) {
-  DCHECK(layer_tree_host_->animation_host());
-  layer_tree_host_->animation_host()->RemoveAnimationTimeline(
-      compositor_timeline);
+  cc::AnimationHost* animation_host = layer_tree_host_->GetLayerTree()
+      ->animation_host();
+  DCHECK(animation_host);
+  animation_host->RemoveAnimationTimeline(compositor_timeline);
 }
 
 void RenderWidgetCompositor::setViewportSize(
     const WebSize& device_viewport_size) {
   layer_tree_host_->SetViewportSize(device_viewport_size);
 }
 
 WebFloatPoint RenderWidgetCompositor::adjustEventPointForPinchZoom(
     const WebFloatPoint& point) const {
   return point;
@@ skipping 433 matching lines @@
 
   remote_proto_channel_receiver_->OnProtoReceived(std::move(deserialized));
 }
 
 void RenderWidgetCompositor::SetPaintedDeviceScaleFactor(
     float device_scale) {
   layer_tree_host_->SetPaintedDeviceScaleFactor(device_scale);
 }
 
 }  // namespace content