Fix leaked array buffer allocators of isolates

fxjs/cfxjse_runtimedata.cpp

 // Copyright 2016 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "fxjs/cfxjse_runtimedata.h"
 
 #include "fxjs/cfxjse_isolatetracker.h"
 #include "fxjs/include/fxjs_v8.h"
@@ skipping 38 matching lines @@
 void FXJSE_Finalize() {
   if (!CFXJSE_IsolateTracker::g_pInstance)
     return;
 
   CFXJSE_IsolateTracker::g_pInstance->RemoveAll(Runtime_DisposeCallback);
   delete CFXJSE_IsolateTracker::g_pInstance;
   CFXJSE_IsolateTracker::g_pInstance = nullptr;
 }
 
 v8::Isolate* FXJSE_Runtime_Create_Own() {
+  std::unique_ptr<v8::ArrayBuffer::Allocator> allocator(
+      new FXJSE_ArrayBufferAllocator());
   v8::Isolate::CreateParams params;
-  params.array_buffer_allocator = new FXJSE_ArrayBufferAllocator();
+  params.array_buffer_allocator = allocator.get();
   v8::Isolate* pIsolate = v8::Isolate::New(params);
   ASSERT(pIsolate && CFXJSE_IsolateTracker::g_pInstance);
-  CFXJSE_IsolateTracker::g_pInstance->Append(pIsolate);
+  CFXJSE_IsolateTracker::g_pInstance->Append(pIsolate, std::move(allocator));
   return pIsolate;
 }
 
 void FXJSE_Runtime_Release(v8::Isolate* pIsolate) {
   if (!pIsolate)
     return;
   CFXJSE_IsolateTracker::g_pInstance->Remove(pIsolate, Runtime_DisposeCallback);
 }
 
 CFXJSE_RuntimeData::CFXJSE_RuntimeData(v8::Isolate* pIsolate)
@@ skipping 22 matching lines @@
 
 CFXJSE_RuntimeData* CFXJSE_RuntimeData::Get(v8::Isolate* pIsolate) {
   FXJS_PerIsolateData::SetUp(pIsolate);
   FXJS_PerIsolateData* pData = FXJS_PerIsolateData::Get(pIsolate);
   if (!pData->m_pFXJSERuntimeData)
     pData->m_pFXJSERuntimeData = CFXJSE_RuntimeData::Create(pIsolate);
   return pData->m_pFXJSERuntimeData;
 }
 
 CFXJSE_IsolateTracker* CFXJSE_IsolateTracker::g_pInstance = nullptr;