Switch cc to std::unordered_*.

cc/animation/animation_host.h

Index: cc/animation/animation_host.h
diff --git a/cc/animation/animation_host.h b/cc/animation/animation_host.h
index 1bec4ec0ff93ea4ba1f081b2c1334e5c1954f8fa..2cddf6a0d4e169355e8a554091bc32ed47d6ad45 100644
--- a/cc/animation/animation_host.h
+++ b/cc/animation/animation_host.h
@@ -5,9 +5,9 @@
 #ifndef CC_ANIMATION_ANIMATION_HOST_H_
 #define CC_ANIMATION_ANIMATION_HOST_H_
 
+#include <unordered_map>
 #include <vector>
 
-#include "base/containers/scoped_ptr_hash_map.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ -167,8 +167,8 @@ class CC_EXPORT AnimationHost {
   // TODO(loyso): For now AnimationPlayers share LayerAnimationController object
   // if they are attached to the same element(layer). Note that Element can
   // contain many Layers.
-  typedef base::ScopedPtrHashMap<int, scoped_ptr<ElementAnimations>>
-      LayerToElementAnimationsMap;
+  using LayerToElementAnimationsMap =
+      std::unordered_map<int, scoped_ptr<ElementAnimations>>;
   LayerToElementAnimationsMap layer_to_element_animations_map_;
 
   AnimationTimelineList timelines_;