Oilpan: have Storage objects reside on the heap by default.

Source/modules/storage/StorageArea.cpp

 /*
  * Copyright (C) 2009 Google Inc. All Rights Reserved.
  *           (C) 2008 Apple Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 29 matching lines @@
 #include "modules/storage/StorageEvent.h"
 #include "modules/storage/StorageNamespace.h"
 #include "modules/storage/StorageNamespaceController.h"
 #include "platform/weborigin/SecurityOrigin.h"
 #include "public/platform/WebStorageArea.h"
 #include "public/platform/WebString.h"
 #include "public/platform/WebURL.h"
 
 namespace blink {
 
-PassOwnPtrWillBeRawPtr<StorageArea> StorageArea::create(PassOwnPtr<WebStorageArea> storageArea, StorageType storageType)
+StorageArea* StorageArea::create(PassOwnPtr<WebStorageArea> storageArea, StorageType storageType)
 {
-    return adoptPtrWillBeNoop(new StorageArea(storageArea, storageType));
+    return new StorageArea(storageArea, storageType);
 }
 
 StorageArea::StorageArea(PassOwnPtr<WebStorageArea> storageArea, StorageType storageType)
     : LocalFrameLifecycleObserver(nullptr)
     , m_storageArea(storageArea)
     , m_storageType(storageType)
     , m_canAccessStorageCachedResult(false)
 {
 }
 
@@ skipping 151 matching lines @@
 }
 
 bool StorageArea::isEventSource(Storage* storage, WebStorageArea* sourceAreaInstance)
 {
     ASSERT(storage);
     StorageArea* area = storage->area();
     return area->m_storageArea == sourceAreaInstance;
 }
 
 } // namespace blink