Use tighter typing in editing/

Source/core/editing/IndentOutdentCommand.cpp

 /*
  * 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 75 matching lines @@
     }
 
     if (canMergeLists(previousList.get(), newList.get()))
         mergeIdenticalElements(previousList.get(), newList.get());
     if (canMergeLists(newList.get(), nextList.get()))
         mergeIdenticalElements(newList.get(), nextList.get());
 
     return true;
 }
 
-void IndentOutdentCommand::indentIntoBlockquote(const Position& start, const Position& end, RefPtrWillBeRawPtr<Element>& targetBlockquote)
+void IndentOutdentCommand::indentIntoBlockquote(const Position& start, const Position& end, RefPtrWillBeRawPtr<HTMLElement>& targetBlockquote)
 {
     Node* enclosingCell = enclosingNodeOfType(start, &isTableCell);
     Node* nodeToSplitTo;
     if (enclosingCell)
         nodeToSplitTo = enclosingCell;
     else if (enclosingList(start.containerNode()))
         nodeToSplitTo = enclosingBlock(start.containerNode());
     else
         nodeToSplitTo = editableRootForPosition(start);
 
@@ skipping 129 matching lines @@
 }
 
 void IndentOutdentCommand::formatSelection(const VisiblePosition& startOfSelection, const VisiblePosition& endOfSelection)
 {
     if (m_typeOfAction == Indent)
         ApplyBlockElementCommand::formatSelection(startOfSelection, endOfSelection);
     else
         outdentRegion(startOfSelection, endOfSelection);
 }
 
-void IndentOutdentCommand::formatRange(const Position& start, const Position& end, const Position&, RefPtrWillBeRawPtr<Element>& blockquoteForNextIndent)
+void IndentOutdentCommand::formatRange(const Position& start, const Position& end, const Position&, RefPtrWillBeRawPtr<HTMLElement>& blockquoteForNextIndent)
 {
     if (tryIndentingAsListItem(start, end))
         blockquoteForNextIndent = nullptr;
     else
         indentIntoBlockquote(start, end, blockquoteForNextIndent);
 }
 
 }