Switch cc to std::unordered_*.

cc/layers/delegated_frame_resource_collection.h

Index: cc/layers/delegated_frame_resource_collection.h
diff --git a/cc/layers/delegated_frame_resource_collection.h b/cc/layers/delegated_frame_resource_collection.h
index 0e38c684d3e5be69f07d9a01b23ff774b5b395e9..e7b996b81d1ce41bf7d04f1181f83f29236b8138 100644
--- a/cc/layers/delegated_frame_resource_collection.h
+++ b/cc/layers/delegated_frame_resource_collection.h
@@ -5,7 +5,8 @@
 #ifndef CC_LAYERS_DELEGATED_FRAME_RESOURCE_COLLECTION_H_
 #define CC_LAYERS_DELEGATED_FRAME_RESOURCE_COLLECTION_H_
 
-#include "base/containers/hash_tables.h"
+#include <unordered_map>
+
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
@@ -56,7 +57,7 @@ class CC_EXPORT DelegatedFrameResourceCollection
     int refs_to_return;
     int refs_to_wait_for;
   };
-  typedef base::hash_map<unsigned, RefCount> ResourceIdRefCountMap;
+  using ResourceIdRefCountMap = std::unordered_map<unsigned, RefCount>;
   ResourceIdRefCountMap resource_id_ref_count_map_;
 
   base::ThreadChecker main_thread_checker_;