Use tighter typing in editing/

Source/core/editing/ApplyBlockElementCommand.cpp

 /*
  * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2010 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:
  * 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
@@ skipping 93 matching lines @@
             setEndingSelection(VisibleSelection(start, end, endingSelection().isDirectional()));
     }
 }
 
 void ApplyBlockElementCommand::formatSelection(const VisiblePosition& startOfSelection, const VisiblePosition& endOfSelection)
 {
     // Special case empty unsplittable elements because there's nothing to split
     // and there's nothing to move.
     Position start = startOfSelection.deepEquivalent().downstream();
     if (isAtUnsplittableElement(start)) {
-        RefPtrWillBeRawPtr<Element> blockquote = createBlockElement();
+        RefPtrWillBeRawPtr<HTMLElement> blockquote = createBlockElement();
         insertNodeAt(blockquote, start);
         RefPtrWillBeRawPtr<Element> placeholder = createBreakElement(document());
         appendNode(placeholder, blockquote);
         setEndingSelection(VisibleSelection(positionBeforeNode(placeholder.get()), DOWNSTREAM, endingSelection().isDirectional()));
         return;
     }
 
-    RefPtrWillBeRawPtr<Element> blockquoteForNextIndent = nullptr;
+    RefPtrWillBeRawPtr<HTMLElement> blockquoteForNextIndent = nullptr;
     VisiblePosition endOfCurrentParagraph = endOfParagraph(startOfSelection);
     VisiblePosition endOfLastParagraph = endOfParagraph(endOfSelection);
     VisiblePosition endAfterSelection = endOfParagraph(endOfLastParagraph.next());
     m_endOfLastParagraph = endOfLastParagraph.deepEquivalent();
 
     bool atEnd = false;
     Position end;
     while (endOfCurrentParagraph != endAfterSelection && !atEnd) {
         if (endOfCurrentParagraph.deepEquivalent() == m_endOfLastParagraph)
             atEnd = true;
@@ skipping 140 matching lines @@
             if (text->previousSibling()->isTextNode()
                 && static_cast<unsigned>(m_endOfLastParagraph.offsetInContainerNode()) <= toText(text->previousSibling())->length())
                 m_endOfLastParagraph = Position(toText(text->previousSibling()), m_endOfLastParagraph.offsetInContainerNode());
         } else
             m_endOfLastParagraph = Position(text.get(), m_endOfLastParagraph.offsetInContainerNode() - 1);
     }
 
     return VisiblePosition(Position(text.get(), position.offsetInContainerNode() - 1));
 }
 
-PassRefPtrWillBeRawPtr<Element> ApplyBlockElementCommand::createBlockElement() const
+PassRefPtrWillBeRawPtr<HTMLElement> ApplyBlockElementCommand::createBlockElement() const
 {
-    RefPtrWillBeRawPtr<Element> element = createHTMLElement(document(), m_tagName);
+    RefPtrWillBeRawPtr<HTMLElement> element = createHTMLElement(document(), m_tagName);
     if (m_inlineStyle.length())
         element->setAttribute(styleAttr, m_inlineStyle);
     return element.release();
 }
 
 void ApplyBlockElementCommand::trace(Visitor* visitor)
 {
     visitor->trace(m_endOfLastParagraph);
     CompositeEditCommand::trace(visitor);
 }
 
 }