More switching to standard type traits

third_party/WebKit/Source/wtf/OwnPtrCommon.h

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile, Inc.
  * Copyright (C) 2010 Company 100 Inc.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 21 matching lines @@
 #include "wtf/Assertions.h"
 #include "wtf/TypeTraits.h"
 
 namespace WTF {
 
 class RefCountedBase;
 class ThreadSafeRefCountedBase;
 
 template<typename T>
 struct IsRefCounted {
-    static const bool value = IsSubclass<T, RefCountedBase>::value
-        || IsSubclass<T, ThreadSafeRefCountedBase>::value;
+    static const bool value = std::is_base_of<RefCountedBase, T>::value
+        || std::is_base_of<ThreadSafeRefCountedBase, T>::value;
 };
 
 template <typename T>
 struct OwnedPtrDeleter {
     static void deletePtr(T* ptr)
     {
         static_assert(!IsRefCounted<T>::value, "use RefPtr for RefCounted objects");
         static_assert(sizeof(T) > 0, "type must be complete");
         delete ptr;
     }
@@ skipping 10 matching lines @@
 };
 
 template <class T, int n>
 struct OwnedPtrDeleter<T[n]> {
     static_assert(sizeof(T) < 0, "do not use array with size as type");
 };
 
 } // namespace WTF
 
 #endif // WTF_OwnPtrCommon_h