Switch cc to std::unordered_*.

cc/animation/layer_animation_controller.h

Index: cc/animation/layer_animation_controller.h
diff --git a/cc/animation/layer_animation_controller.h b/cc/animation/layer_animation_controller.h
index cbff7aa71103c34600ca90979a04008124ff1264..a283d1f8f5c4eb39b9252a7063a5cc753600d2d7 100644
--- a/cc/animation/layer_animation_controller.h
+++ b/cc/animation/layer_animation_controller.h
@@ -5,9 +5,9 @@
 #ifndef CC_ANIMATION_LAYER_ANIMATION_CONTROLLER_H_
 #define CC_ANIMATION_LAYER_ANIMATION_CONTROLLER_H_
 
+#include <unordered_set>
 #include <vector>
 
-#include "base/containers/hash_tables.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ -178,7 +178,7 @@ class CC_EXPORT LayerAnimationController
   virtual ~LayerAnimationController();
 
  private:
-  typedef base::hash_set<int> TargetProperties;
+  typedef std::unordered_set<int> TargetProperties;
 
   void PushNewAnimationsToImplThread(
       LayerAnimationController* controller_impl) const;