Switch cc to std::unordered_*.

cc/trees/layer_tree_host.h

Index: cc/trees/layer_tree_host.h
diff --git a/cc/trees/layer_tree_host.h b/cc/trees/layer_tree_host.h
index f7bd43368c3abde927cf59c358cf6ea2273b141b..edd0974161daeaf73b1f0b4223b6638ac7307ac3 100644
--- a/cc/trees/layer_tree_host.h
+++ b/cc/trees/layer_tree_host.h
@@ -11,10 +11,10 @@
 #include <limits>
 #include <set>
 #include <string>
+#include <unordered_map>
 #include <vector>
 
 #include "base/cancelable_callback.h"
-#include "base/containers/hash_tables.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ -421,7 +421,7 @@ class CC_EXPORT LayerTreeHost : public MutatorHostClient {
     gfx::Size size;
   };
 
-  typedef base::hash_map<UIResourceId, UIResourceClientData>
+  typedef std::unordered_map<UIResourceId, UIResourceClientData>
       UIResourceClientMap;
   UIResourceClientMap ui_resource_client_map_;
   int next_ui_resource_id_;
@@ -515,7 +515,7 @@ class CC_EXPORT LayerTreeHost : public MutatorHostClient {
 
   PropertyTrees property_trees_;
 
-  typedef base::hash_map<int, Layer*> LayerIdMap;
+  typedef std::unordered_map<int, Layer*> LayerIdMap;
   LayerIdMap layer_id_map_;
 
   uint32_t surface_id_namespace_;