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

gin/isolate_holder.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/public/isolate_holder.h"
 
 #include <stdlib.h>
 #include <string.h>
 
 #include "base/logging.h"
@@ skipping 35 matching lines @@
 }  // namespace
 
 IsolateHolder::IsolateHolder()
   : isolate_owner_(true) {
   EnsureV8Initialized(true);
   isolate_ = v8::Isolate::New();
   v8::ResourceConstraints constraints;
   constraints.ConfigureDefaults(base::SysInfo::AmountOfPhysicalMemory(),
                                 base::SysInfo::NumberOfProcessors());
   v8::SetResourceConstraints(isolate_, &constraints);
-  Init();
+  Init(ArrayBufferAllocator::SharedInstance());
 }
 
 IsolateHolder::IsolateHolder(v8::Isolate* isolate)
     : isolate_owner_(false),
       isolate_(isolate) {
   EnsureV8Initialized(false);
-  Init();
+  Init(NULL);
+}
+
+IsolateHolder::IsolateHolder(v8::Isolate* isolate,
+                             v8::ArrayBuffer::Allocator* allocator)
+    : isolate_owner_(false), isolate_(isolate) {
+  EnsureV8Initialized(false);
+  Init(allocator);
 }
 
 IsolateHolder::~IsolateHolder() {
   isolate_data_.reset();
   if (isolate_owner_)
     isolate_->Dispose();
 }
 
-void IsolateHolder::Init() {
+void IsolateHolder::Init(v8::ArrayBuffer::Allocator* allocator) {
   v8::Isolate::Scope isolate_scope(isolate_);
   v8::HandleScope handle_scope(isolate_);
-  isolate_data_.reset(new PerIsolateData(isolate_));
+  isolate_data_.reset(new PerIsolateData(isolate_, allocator));
 }
 
 }  // namespace gin