Switch cc to std::unordered_*.

cc/surfaces/surface_manager.h

Index: cc/surfaces/surface_manager.h
diff --git a/cc/surfaces/surface_manager.h b/cc/surfaces/surface_manager.h
index d4fc144b46bd6fa09d90ca857a542b554a28c6c6..a3f7b9b19ff8cc0b466fac599d13499c9ff4d3bd 100644
--- a/cc/surfaces/surface_manager.h
+++ b/cc/surfaces/surface_manager.h
@@ -9,9 +9,9 @@
 
 #include <list>
 #include <unordered_map>
+#include <unordered_set>
 #include <vector>
 
-#include "base/containers/hash_tables.h"
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "base/threading/thread_checker.h"
@@ -73,12 +73,12 @@ class CC_SURFACES_EXPORT SurfaceManager {
 
   // Set of SurfaceSequences that have been satisfied by a frame but not yet
   // waited on.
-  base::hash_set<SurfaceSequence> satisfied_sequences_;
+  std::unordered_set<SurfaceSequence, SurfaceSequenceHash> satisfied_sequences_;
 
   // Set of valid surface ID namespaces. When a namespace is removed from
   // this set, any remaining sequences with that namespace are considered
   // satisfied.
-  base::hash_set<uint32_t> valid_surface_id_namespaces_;
+  std::unordered_set<uint32_t> valid_surface_id_namespaces_;
 
   DISALLOW_COPY_AND_ASSIGN(SurfaceManager);
 };