Switch cc to std::unordered_*.

cc/trees/layer_tree_host_impl.h

Index: cc/trees/layer_tree_host_impl.h
diff --git a/cc/trees/layer_tree_host_impl.h b/cc/trees/layer_tree_host_impl.h
index f7391beba013ad58220cc6a794bc6881c400b401..fbb61c5e11e6bf7d15f037179a034b3e7db46fcc 100644
--- a/cc/trees/layer_tree_host_impl.h
+++ b/cc/trees/layer_tree_host_impl.h
@@ -9,9 +9,9 @@
 
 #include <set>
 #include <string>
+#include <unordered_map>
 #include <vector>
 
-#include "base/containers/hash_tables.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
@@ -702,8 +702,7 @@ class CC_EXPORT LayerTreeHostImpl
   bool ScrollAnimationUpdateTarget(LayerImpl* layer_impl,
                                    const gfx::Vector2dF& scroll_delta);
 
-  typedef base::hash_map<UIResourceId, UIResourceData>
-      UIResourceMap;
+  typedef std::unordered_map<UIResourceId, UIResourceData> UIResourceMap;
   UIResourceMap ui_resource_map_;
 
   // Resources that were evicted by EvictAllUIResources. Resources are removed
@@ -805,7 +804,7 @@ class CC_EXPORT LayerTreeHostImpl
 
   // Map from scroll layer ID to scrollbar animation controller.
   // There is one animation controller per pair of overlay scrollbars.
-  base::ScopedPtrHashMap<int, scoped_ptr<ScrollbarAnimationController>>
+  std::unordered_map<int, scoped_ptr<ScrollbarAnimationController>>
       scrollbar_animation_controllers_;
 
   RenderingStatsInstrumentation* rendering_stats_instrumentation_;