Provide a convenience array buffer allocator

test/fuzzer/fuzzer-support.h

 // Copyright 2016 the V8 project 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 TEST_FUZZER_FUZZER_SUPPORT_H_
 #define TEST_FUZZER_FUZZER_SUPPORT_H_
 
 #include "include/v8.h"
 
 namespace v8_fuzzer {
 
 class FuzzerSupport {
  public:
   FuzzerSupport(int* argc, char*** argv);
   ~FuzzerSupport();
 
   static FuzzerSupport* Get();
 
   v8::Isolate* GetIsolate();
   v8::Local<v8::Context> GetContext();
 
  private:
   // Prevent copying. Not implemented.
   FuzzerSupport(const FuzzerSupport&);
   FuzzerSupport& operator=(const FuzzerSupport&);
 
-  class ArrayBufferAllocator;
 
   v8::Platform* platform_;
-  ArrayBufferAllocator* allocator_;
+  v8::ArrayBuffer::Allocator* allocator_;
   v8::Isolate* isolate_;
   v8::Global<v8::Context> context_;
 };
 
 }  // namespace
 
 #endif  //  TEST_FUZZER_FUZZER_SUPPORT_H_