gin: Make it possible to use gin array buffers when running on top of blink

gin/per_isolate_data.cc

 // Copyright 2013 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.
 
 #include "gin/per_isolate_data.h"
 #include "gin/public/gin_embedders.h"
 
+using v8::ArrayBuffer;
 using v8::Eternal;
 using v8::Isolate;
 using v8::Local;
 using v8::Object;
 using v8::FunctionTemplate;
 using v8::ObjectTemplate;
 
 namespace gin {
 
-PerIsolateData::PerIsolateData(Isolate* isolate)
-    : isolate_(isolate)  {
+PerIsolateData::PerIsolateData(Isolate* isolate,
+                               ArrayBuffer::Allocator* allocator)
+    : isolate_(isolate), allocator_(allocator) {
   isolate_->SetData(kEmbedderNativeGin, this);
 }
 
 PerIsolateData::~PerIsolateData() {
   isolate_->SetData(kEmbedderNativeGin, NULL);
 }
 
 PerIsolateData* PerIsolateData::From(Isolate* isolate) {
   return static_cast<PerIsolateData*>(isolate->GetData(kEmbedderNativeGin));
 }
@@ skipping 18 matching lines @@
 
 v8::Local<v8::FunctionTemplate> PerIsolateData::GetFunctionTemplate(
     WrapperInfo* info) {
   FunctionTemplateMap::iterator it = function_templates_.find(info);
   if (it == function_templates_.end())
     return v8::Local<v8::FunctionTemplate>();
   return it->second.Get(isolate_);
 }
 
 }  // namespace gin