Revert of [Oilpan] Prepare full definition of classes before using Member

third_party/WebKit/Source/modules/storage/DOMWindowStorage.cpp

 // Copyright 2015 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 "config.h"
 #include "modules/storage/DOMWindowStorage.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/LocalDOMWindow.h"
@@ skipping 125 matching lines @@
         return nullptr;
     StorageArea* storageArea = StorageNamespace::localStorageArea(document->securityOrigin());
     if (!storageArea->canAccessStorage(m_window->frame())) {
         exceptionState.throwSecurityError(accessDeniedMessage);
         return nullptr;
     }
     m_localStorage = Storage::create(m_window->frame(), storageArea);
     return m_localStorage;
 }
 
-Storage* DOMWindowStorage::optionalSessionStorage() const
-{
-    return m_sessionStorage.get();
-}
-
-Storage* DOMWindowStorage::optionalLocalStorage() const
-{
-    return m_localStorage.get();
-}
-
 } // namespace blink