Switch cc to std::unordered_*.

cc/animation/layer_tree_mutation.h

 // 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.
 
 #ifndef CC_ANIMATION_LAYER_TREE_MUTATION_H_
 #define CC_ANIMATION_LAYER_TREE_MUTATION_H_
 
-#include "base/containers/hash_tables.h"
+#include <unordered_map>
+
 #include "cc/animation/mutable_properties.h"
 #include "third_party/skia/include/utils/SkMatrix44.h"
 
 namespace cc {
 
 class LayerTreeMutation {
  public:
   void SetOpacity(float opacity) {
     mutated_flags_ |= kMutablePropertyOpacity;
     opacity_ = opacity;
@@ skipping 30 matching lines @@
   SkMatrix44 transform() const { return transform_; }
 
  private:
   uint32_t mutated_flags_ = 0;
   float opacity_ = 0;
   float scroll_left_ = 0;
   float scroll_top_ = 0;
   SkMatrix44 transform_;
 };
 
-typedef base::hash_map<uint64_t, LayerTreeMutation> LayerTreeMutationMap;
+typedef std::unordered_map<uint64_t, LayerTreeMutation> LayerTreeMutationMap;
 
 }  // namespace cc
 
 #endif  // CC_ANIMATION_LAYER_TREE_MUTATION_H_