Use tighter typing in editing/

Source/core/editing/DeleteSelectionCommand.cpp

Index: Source/core/editing/DeleteSelectionCommand.cpp
diff --git a/Source/core/editing/DeleteSelectionCommand.cpp b/Source/core/editing/DeleteSelectionCommand.cpp
index c86e09f7a8f1200ad7b8470d8a6a8dc3f5ec94fb..093338b47b04488075c0659ab801284d7e180212 100644
--- a/Source/core/editing/DeleteSelectionCommand.cpp
+++ b/Source/core/editing/DeleteSelectionCommand.cpp
@@ -98,8 +98,8 @@ DeleteSelectionCommand::DeleteSelectionCommand(const VisibleSelection& selection
 
 void DeleteSelectionCommand::initializeStartEnd(Position& start, Position& end)
 {
-    Node* startSpecialContainer = 0;
-    Node* endSpecialContainer = 0;
+    HTMLElement* startSpecialContainer = 0;
+    HTMLElement* endSpecialContainer = 0;
 
     start = m_selectionToDelete.start();
     end = m_selectionToDelete.end();