Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/html/HTMLButtonElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 13 matching lines @@
 #ifndef HTMLButtonElement_h
 #define HTMLButtonElement_h
 
 #include "core/html/HTMLFormControlElement.h"
 
 namespace blink {
 
 class HTMLButtonElement final : public HTMLFormControlElement {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PassRefPtrWillBeRawPtr<HTMLButtonElement> create(Document&, HTMLFormElement*);
+    static RawPtr<HTMLButtonElement> create(Document&, HTMLFormElement*);
 
     void setType(const AtomicString&);
 
     const AtomicString& value() const;
 
     bool willRespondToMouseClickEvents() override;
 
 private:
     HTMLButtonElement(Document&, HTMLFormElement*);
 
@@ skipping 30 matching lines @@
     bool isOptionalFormControl() const override { return true; }
     bool recalcWillValidate() const override;
 
     Type m_type;
     bool m_isActivatedSubmit;
 };
 
 } // namespace blink
 
 #endif // HTMLButtonElement_h