More switching to standard type traits

third_party/WebKit/Source/platform/heap/ThreadingTraits.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ThreadingTraits_h
 #define ThreadingTraits_h
 
 #include "wtf/Deque.h"
 #include "wtf/HashCountedSet.h"
 #include "wtf/HashMap.h"
@@ skipping 17 matching lines @@
     AnyThread,
     MainThreadOnly,
 };
 
 // TODO(haraken): These forward declarations violate dependency rules.
 // Remove them.
 class Node;
 class NodeList;
 
 template<typename T,
-    bool mainThreadOnly = WTF::IsSubclass<typename std::remove_const<T>::type, Node>::value
-        || WTF::IsSubclass<typename std::remove_const<T>::type, NodeList>::value> struct DefaultThreadingTrait;
+    bool mainThreadOnly = std::is_base_of<Node, T>::value
+        || std::is_base_of<NodeList, T>::value> struct DefaultThreadingTrait;
 
 template<typename T>
 struct DefaultThreadingTrait<T, false> {
     static const ThreadAffinity Affinity = AnyThread;
 };
 
 template<typename T>
 struct DefaultThreadingTrait<T, true> {
     static const ThreadAffinity Affinity = MainThreadOnly;
 };
@@ skipping 82 matching lines @@
 template<typename T, size_t inlineCapacity>
 struct ThreadingTrait<HeapVector<T, inlineCapacity>> : public ThreadingTrait<Vector<T, inlineCapacity, HeapAllocator>> { };
 template<typename T, size_t inlineCapacity>
 struct ThreadingTrait<HeapDeque<T, inlineCapacity>> : public ThreadingTrait<Deque<T, inlineCapacity, HeapAllocator>> { };
 template<typename T, typename U, typename V>
 struct ThreadingTrait<HeapHashCountedSet<T, U, V>> : public ThreadingTrait<HashCountedSet<T, U, V, HeapAllocator>> { };
 
 } // namespace blink
 
 #endif