Add ifdef to make upstreaming of v8_utility.h easiler.

webkit/port/bindings/v8/v8_utility.h

 // Copyright (c) 2006-2008 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 V8_UTILITY_H__
 #define V8_UTILITY_H__
 
+#include "V8Utilities.h"
+
+// To break a cycle dependency during upstreaming this block of code,
+// ifdefing it out based on this #define.
+//
+// TODO(ajwong): After https://bugs.webkit.org/show_bug.cgi?id=25595
+// lands and is rolled down into chromium, migrate all headaers to use
+// the code in V8Utilities.h directly, and then, remove this code.
+#ifndef V8UTILITIES_DEFINED
 namespace WebCore {
 
 class AllowAllocation {
  public:
   inline AllowAllocation() {
     m_prev = m_current;
     m_current = true;
   }
   inline ~AllowAllocation() {
     m_current = m_prev;
@@ skipping 29 matching lines @@
 }
 
 v8::Local<v8::Object> SafeAllocation::NewInstance(
     v8::Handle<v8::Function> fun, int argc, v8::Handle<v8::Value> argv[]) {
   if (fun.IsEmpty()) return v8::Local<v8::Object>();
   AllowAllocation allow;
   return fun->NewInstance(argc, argv);
 }
 
 }  // namespace WebCore
+#endif  // V8UTILITIES_DEFINED
 
 #endif   // V8_UTILITY_H__