Switch cc to std::unordered_*.

cc/surfaces/surface.h

Index: cc/surfaces/surface.h
diff --git a/cc/surfaces/surface.h b/cc/surfaces/surface.h
index a83aee38119b4a2b726cb336fab9c4b3ef2878ff..97706eb9ab3226d4e8354f4537316d4e76a48f90 100644
--- a/cc/surfaces/surface.h
+++ b/cc/surfaces/surface.h
@@ -10,10 +10,10 @@
 
 #include <map>
 #include <set>
+#include <unordered_set>
 #include <vector>
 
 #include "base/callback.h"
-#include "base/containers/hash_tables.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
@@ -71,8 +71,8 @@ class CC_SURFACES_EXPORT Surface {
   // Satisfy all destruction dependencies that are contained in sequences, and
   // remove them from sequences.
   void SatisfyDestructionDependencies(
-      base::hash_set<SurfaceSequence>* sequences,
-      base::hash_set<uint32_t>* valid_id_namespaces);
+      std::unordered_set<SurfaceSequence, SurfaceSequenceHash>* sequences,
+      std::unordered_set<uint32_t>* valid_id_namespaces);
   size_t GetDestructionDependencyCount() const {
     return destruction_dependencies_.size();
   }