Use tighter typing in editing: DeleteSelectionCommand

Source/core/editing/DeleteSelectionCommand.h

 /*
  * Copyright (C) 2005, 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 13 matching lines @@
  */
 
 #ifndef DeleteSelectionCommand_h
 #define DeleteSelectionCommand_h
 
 #include "core/editing/CompositeEditCommand.h"
 
 namespace blink {
 
 class EditingStyle;
+class HTMLTableRowElement;
 
 class DeleteSelectionCommand FINAL : public CompositeEditCommand {
 public:
     static PassRefPtrWillBeRawPtr<DeleteSelectionCommand> create(Document& document, bool smartDelete = false, bool mergeBlocksAfterDelete = true, bool expandForSpecialElements = false, bool sanitizeMarkup = true)
     {
         return adoptRefWillBeNoop(new DeleteSelectionCommand(document, smartDelete, mergeBlocksAfterDelete, expandForSpecialElements, sanitizeMarkup));
     }
     static PassRefPtrWillBeRawPtr<DeleteSelectionCommand> create(const VisibleSelection& selection, bool smartDelete = false, bool mergeBlocksAfterDelete = true, bool expandForSpecialElements = false, bool sanitizeMarkup = true)
     {
         return adoptRefWillBeNoop(new DeleteSelectionCommand(selection, smartDelete, mergeBlocksAfterDelete, expandForSpecialElements, sanitizeMarkup));
@@ skipping 41 matching lines @@
     Position m_downstreamStart;
     Position m_upstreamEnd;
     Position m_downstreamEnd;
     Position m_endingPosition;
     Position m_leadingWhitespace;
     Position m_trailingWhitespace;
     RefPtrWillBeMember<Node> m_startBlock;
     RefPtrWillBeMember<Node> m_endBlock;
     RefPtrWillBeMember<EditingStyle> m_typingStyle;
     RefPtrWillBeMember<EditingStyle> m_deleteIntoBlockquoteStyle;
-    RefPtrWillBeMember<Node> m_startRoot;
-    RefPtrWillBeMember<Node> m_endRoot;
-    RefPtrWillBeMember<Node> m_startTableRow;
-    RefPtrWillBeMember<Node> m_endTableRow;
+    RefPtrWillBeMember<Element> m_startRoot;
+    RefPtrWillBeMember<Element> m_endRoot;
+    RefPtrWillBeMember<HTMLTableRowElement> m_startTableRow;
+    RefPtrWillBeMember<HTMLTableRowElement> m_endTableRow;
     RefPtrWillBeMember<Node> m_temporaryPlaceholder;
 };
 
 } // namespace blink
 
 #endif // DeleteSelectionCommand_h