Use tighter typing in editing/

Source/core/editing/IndentOutdentCommand.h

 /*
  * Copyright (C) 2006, 2008 Apple 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:
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 31 matching lines @@
     virtual bool preservesTypingStyle() const OVERRIDE { return true; }
 
 private:
     IndentOutdentCommand(Document&, EIndentType);
 
     virtual EditAction editingAction() const OVERRIDE { return m_typeOfAction == Indent ? EditActionIndent : EditActionOutdent; }
 
     void outdentRegion(const VisiblePosition&, const VisiblePosition&);
     void outdentParagraph();
     bool tryIndentingAsListItem(const Position&, const Position&);
-    void indentIntoBlockquote(const Position&, const Position&, RefPtrWillBeRawPtr<Element>&);
+    void indentIntoBlockquote(const Position&, const Position&, RefPtrWillBeRawPtr<HTMLElement>&);
 
     virtual void formatSelection(const VisiblePosition& startOfSelection, const VisiblePosition& endOfSelection) OVERRIDE;
-    virtual void formatRange(const Position& start, const Position& end, const Position& endOfSelection, RefPtrWillBeRawPtr<Element>& blockquoteForNextIndent) OVERRIDE;
+    virtual void formatRange(const Position& start, const Position& end, const Position& endOfSelection, RefPtrWillBeRawPtr<HTMLElement>& blockquoteForNextIndent) OVERRIDE;
 
     EIndentType m_typeOfAction;
 };
 
 } // namespace blink
 
 #endif // IndentOutdentCommand_h