Provide a convenience array buffer allocator

test/cctest/interpreter/generate-bytecode-expectations.cc

Index: test/cctest/interpreter/generate-bytecode-expectations.cc
diff --git a/test/cctest/interpreter/generate-bytecode-expectations.cc b/test/cctest/interpreter/generate-bytecode-expectations.cc
index 53f2e3fce3e532731d5220e19d8b19e0a8c0647a..f8237593e4ce84d79a7fed7e8c795f90306002a4 100644
--- a/test/cctest/interpreter/generate-bytecode-expectations.cc
+++ b/test/cctest/interpreter/generate-bytecode-expectations.cc
@@ -93,17 +93,6 @@ class ProgramOptions final {
   std::string test_function_name_;
 };
 
-class ArrayBufferAllocator final : public v8::ArrayBuffer::Allocator {
- public:
-  void* Allocate(size_t length) override {
-    void* data = AllocateUninitialized(length);
-    if (data != nullptr) memset(data, 0, length);
-    return data;
-  }
-  void* AllocateUninitialized(size_t length) override { return malloc(length); }
-  void Free(void* data, size_t) override { free(data); }
-};
-
 class V8InitializationScope final {
  public:
   explicit V8InitializationScope(const char* exec_path);
@@ -114,6 +103,7 @@ class V8InitializationScope final {
 
  private:
   v8::base::SmartPointer<v8::Platform> platform_;
+  v8::base::SmartPointer<v8::ArrayBuffer::Allocator> allocator_;
   v8::Isolate* isolate_;
 
   DISALLOW_COPY_AND_ASSIGN(V8InitializationScope);
@@ -363,9 +353,9 @@ V8InitializationScope::V8InitializationScope(const char* exec_path)
   v8::V8::InitializePlatform(platform_.get());
   v8::V8::Initialize();
 
-  ArrayBufferAllocator allocator;
   v8::Isolate::CreateParams create_params;
-  create_params.array_buffer_allocator = &allocator;
+  allocator_.Reset(v8::ArrayBuffer::Allocator::NewDefaultAllocator());
+  create_params.array_buffer_allocator = allocator_.get();
 
   isolate_ = v8::Isolate::New(create_params);
 }