Oilpan: move DateTimeChooser to the heap.

third_party/WebKit/Source/web/DateTimeChooserImpl.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 25 matching lines @@
 #include "core/page/PagePopupClient.h"
 
 namespace blink {
 
 class ChromeClientImpl;
 class DateTimeChooserClient;
 class PagePopup;
 
 class DateTimeChooserImpl final : public DateTimeChooser, public PagePopupClient {
 public:
-    static PassRefPtr<DateTimeChooserImpl> create(ChromeClientImpl*, DateTimeChooserClient*, const DateTimeChooserParameters&);
+    static PassRefPtrWillBeRawPtr<DateTimeChooserImpl> create(ChromeClientImpl*, DateTimeChooserClient*, const DateTimeChooserParameters&);
     ~DateTimeChooserImpl() override;
 
     // DateTimeChooser functions:
     void endChooser() override;
     AXObject* rootAXObject() override;
 
+    DECLARE_VIRTUAL_TRACE();
+
 private:
     DateTimeChooserImpl(ChromeClientImpl*, DateTimeChooserClient*, const DateTimeChooserParameters&);
     // PagePopupClient functions:
     IntSize contentSize() override;
     void writeDocument(SharedBuffer*) override;
     void selectFontsFromOwnerDocument(Document&) override { }
     Locale& locale() override;
     void setValueAndClosePopup(int, const String&) override;
     void setValue(const String&) override;
     void closePopup() override;
     Element& ownerElement() override;
     void didClosePopup() override;
 
-    ChromeClientImpl* m_chromeClient;
+    RawPtrWillBeMember<ChromeClientImpl> m_chromeClient;
     DateTimeChooserClient* m_client;
     PagePopup* m_popup;
     DateTimeChooserParameters m_parameters;
     OwnPtr<Locale> m_locale;
 };
 
 }
 
 #endif // ENABLE(INPUT_MULTIPLE_FIELDS_UI)
 
 #endif // DateTimeChooserImpl_h