Move files in wtf/ to platform/wtf/ (Part 5).

third_party/WebKit/Source/wtf/Allocator.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 WTF_Allocator_h
 #define WTF_Allocator_h
 
 #include "wtf/Assertions.h"
-#include "wtf/StdLibExtras.h"
+#include "wtf/TypeTraits.h"
 #include "wtf/allocator/Partitions.h"
 
 namespace WTF {
 
 // Classes that contain references to garbage-collected objects but aren't
 // themselves garbaged allocated, have some extra macros available which
 // allows their use to be restricted to cases where the garbage collector
 // is able to discover their references. These macros will be useful for
 // non-garbage-collected objects to avoid unintended allocations.
 //
@@ skipping 119 matching lines @@
 // variant provides type info unconditionally, so it should be used sparingly.
 // Furthermore, the |WITH_TYPE_NAME| variant does not work if |type| is a
 // template argument; |USING_FAST_MALLOC| does.
 #define USING_FAST_MALLOC(type) \
   USING_FAST_MALLOC_INTERNAL(type, WTF_HEAP_PROFILER_TYPE_NAME(type))
 #define USING_FAST_MALLOC_WITH_TYPE_NAME(type) \
   USING_FAST_MALLOC_INTERNAL(type, #type)
 
 }  // namespace WTF
 
+// This version of placement new omits a 0 check.
+enum NotNullTag { NotNull };
+inline void* operator new(size_t, NotNullTag, void* location) {
+  DCHECK(location);
+  return location;
+}
+
 #endif /* WTF_Allocator_h */