Provide a convenience array buffer allocator

test/unittests/test-utils.cc

Index: test/unittests/test-utils.cc
diff --git a/test/unittests/test-utils.cc b/test/unittests/test-utils.cc
index 7d042151435234c3ee501bb079b401daa41fce39..6ac71d208e6f4c1df34efe81c75d73ba3c02022b 100644
--- a/test/unittests/test-utils.cc
+++ b/test/unittests/test-utils.cc
@@ -13,23 +13,11 @@
 
 namespace v8 {
 
-class ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
- public:
-  virtual void* Allocate(size_t length) {
-    void* data = AllocateUninitialized(length);
-    return data == NULL ? data : memset(data, 0, length);
-  }
-  virtual void* AllocateUninitialized(size_t length) { return malloc(length); }
-  virtual void Free(void* data, size_t) { free(data); }
-};
-
-
 // static
-ArrayBufferAllocator* TestWithIsolate::array_buffer_allocator_ = NULL;
+v8::ArrayBuffer::Allocator* TestWithIsolate::array_buffer_allocator_ = nullptr;
 
 // static
-Isolate* TestWithIsolate::isolate_ = NULL;
-
+Isolate* TestWithIsolate::isolate_ = nullptr;
 
 TestWithIsolate::TestWithIsolate()
     : isolate_scope_(isolate()), handle_scope_(isolate()) {}
@@ -43,7 +31,7 @@ void TestWithIsolate::SetUpTestCase() {
   Test::SetUpTestCase();
   EXPECT_EQ(NULL, isolate_);
   v8::Isolate::CreateParams create_params;
-  array_buffer_allocator_ = new ArrayBufferAllocator;
+  array_buffer_allocator_ = v8::ArrayBuffer::Allocator::NewDefaultAllocator();
   create_params.array_buffer_allocator = array_buffer_allocator_;
   isolate_ = v8::Isolate::New(create_params);
   EXPECT_TRUE(isolate_ != NULL);