Switch cc to std::unordered_*.

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>
 #include <stack>
 #include <string>
+#include <unordered_map>
 
 #include "base/atomic_sequence_num.h"
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/metrics/histogram.h"
 #include "base/single_thread_task_runner.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 34 matching lines @@
 
 namespace {
 static base::StaticAtomicSequenceNumber s_layer_tree_host_sequence_number;
 }
 
 namespace cc {
 namespace {
 
 Layer* UpdateAndGetLayer(Layer* current_layer,
                          int layer_id,
-                         const base::hash_map<int, Layer*>& layer_id_map) {
+                         const std::unordered_map<int, Layer*>& layer_id_map) {
   if (layer_id == Layer::INVALID_ID) {
     if (current_layer)
       current_layer->SetLayerTreeHost(nullptr);
 
     return nullptr;
   }
 
   auto layer_it = layer_id_map.find(layer_id);
   DCHECK(layer_it != layer_id_map.end());
   if (current_layer && current_layer != layer_it->second)
@@ skipping 1369 matching lines @@
   LayerTreeHostCommon::CallFunctionForSubtree(
       root_layer(), [seq_num](Layer* layer) {
         layer->set_property_tree_sequence_number(seq_num);
       });
 
   surface_id_namespace_ = proto.surface_id_namespace();
   next_surface_sequence_ = proto.next_surface_sequence();
 }
 
 }  // namespace cc