Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/web/WebPagePopupImpl.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 88 matching lines @@
 
     explicit WebPagePopupImpl(WebWidgetClient*);
     bool initializePage();
     void destroyPage();
     void setRootGraphicsLayer(GraphicsLayer*);
     void setIsAcceleratedCompositingActive(bool enter);
 
     WebWidgetClient* m_widgetClient;
     WebRect m_windowRectInScreen;
     WebViewImpl* m_webView;
-    OwnPtrWillBePersistent<Page> m_page;
-    OwnPtrWillBePersistent<PagePopupChromeClient> m_chromeClient;
+    Persistent<Page> m_page;
+    Persistent<PagePopupChromeClient> m_chromeClient;
     PagePopupClient* m_popupClient;
     bool m_closing;
 
     WebLayerTreeView* m_layerTreeView;
     WebLayer* m_rootLayer;
     GraphicsLayer* m_rootGraphicsLayer;
     bool m_isAcceleratedCompositingActive;
 
     friend class WebPagePopup;
     friend class PagePopupChromeClient;
 };
 
 DEFINE_TYPE_CASTS(WebPagePopupImpl, WebWidget, widget, widget->isPagePopup(), widget.isPagePopup());
 // WebPagePopupImpl is the only implementation of PagePopup, so no
 // further checking required.
 DEFINE_TYPE_CASTS(WebPagePopupImpl, PagePopup, popup, true, true);
 
 } // namespace blink
 #endif // WebPagePopupImpl_h