Provide a convenience array buffer allocator

src/api.cc

 // Copyright 2012 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.
 
 #include "src/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 6731 matching lines @@
   PREPARE_FOR_EXECUTION(context, Proxy, New, Proxy);
   i::Handle<i::JSReceiver> target = Utils::OpenHandle(*local_target);
   i::Handle<i::JSReceiver> handler = Utils::OpenHandle(*local_handler);
   Local<Proxy> result;
   has_pending_exception =
       !ToLocal<Proxy>(i::JSProxy::New(isolate, target, handler), &result);
   RETURN_ON_FAILED_EXECUTION(Proxy);
   RETURN_ESCAPED(result);
 }
 
+// static
+v8::ArrayBuffer::Allocator* v8::ArrayBuffer::Allocator::NewDefaultAllocator() {
+  return new ArrayBufferAllocator();
+}
+
 bool v8::ArrayBuffer::IsExternal() const {
   return Utils::OpenHandle(this)->is_external();
 }
 
 
 bool v8::ArrayBuffer::IsNeuterable() const {
   return Utils::OpenHandle(this)->is_neuterable();
 }
 
 
@@ skipping 2162 matching lines @@
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 }  // namespace internal
 }  // namespace v8