Refactor MutatorHostClient from LayerTreeHost to LayerTree.

cc/trees/layer_tree_host_unittest_serialization.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/layer_tree_host.h"
 
 #include <memory>
 
 #include "base/memory/ptr_util.h"
 #include "cc/layers/empty_content_layer_client.h"
@@ skipping 74 matching lines @@
     layer_tree_host_src_->GetLayerTree()->in_paint_layer_contents_ = false;
     layer_tree_host_dst_->GetLayerTree()->in_paint_layer_contents_ = false;
 
     // Need to reset LayerTreeHost pointers before tear down.
     layer_tree_host_src_ = nullptr;
     layer_tree_host_dst_ = nullptr;
   }
 
   void VerifyHostHasAllExpectedLayersInTree(Layer* root_layer) {
     LayerTreeHostCommon::CallFunctionForEveryLayer(
-        root_layer->layer_tree_host(), [root_layer](Layer* layer) {
+        root_layer->GetLayerTree(), [root_layer](Layer* layer) {
           DCHECK(layer->layer_tree_host());
-          EXPECT_EQ(layer, layer->layer_tree_host()->LayerById(layer->id()));
+          EXPECT_EQ(layer, layer->GetLayerTree()->LayerById(layer->id()));
         });
   }
 
   void VerifySerializationAndDeserialization() {
     proto::LayerTreeHost proto;
     LayerTree* layer_tree_src = layer_tree_host_src_->GetLayerTree();
     LayerTree* layer_tree_dst = layer_tree_host_dst_->GetLayerTree();
 
     std::unordered_set<Layer*> layers_that_should_push_properties_src =
         layer_tree_src->LayersThatShouldPushProperties();
@@ skipping 103 matching lines @@
               layer_tree_host_dst_->property_trees_);
     EXPECT_EQ(layer_tree_host_src_->surface_client_id_,
               layer_tree_host_dst_->surface_client_id_);
     EXPECT_EQ(layer_tree_host_src_->next_surface_sequence_,
               layer_tree_host_dst_->next_surface_sequence_);
 
     // All layers must have a property tree index that matches PropertyTrees.
     if (layer_tree_host_dst_->property_trees_.sequence_number) {
       int seq_num = layer_tree_host_dst_->property_trees_.sequence_number;
       LayerTreeHostCommon::CallFunctionForEveryLayer(
-          layer_tree_host_dst_.get(), [seq_num](Layer* layer) {
+          layer_tree_host_dst_->GetLayerTree(), [seq_num](Layer* layer) {
             EXPECT_EQ(seq_num, layer->property_tree_sequence_number());
           });
     }
   }
 
   void RunAllMembersChangedTest() {
     layer_tree_host_src_->needs_full_tree_sync_ =
         !layer_tree_host_src_->needs_full_tree_sync_;
     layer_tree_host_src_->needs_meta_info_recomputation_ =
         !layer_tree_host_src_->needs_meta_info_recomputation_;
@@ skipping 219 matching lines @@
 
 TEST_F(LayerTreeHostSerializationTest, AddAndRemoveNodeFromLayerTree) {
   RunAddAndRemoveNodeFromLayerTree();
 }
 
 TEST_F(LayerTreeHostSerializationTest, PictureLayerMultipleSerializations) {
   RunPictureLayerMultipleSerializationsTest();
 }
 
 }  // namespace cc