Use tighter typing in editing: htmlediting create methods

Source/core/editing/htmlediting.cpp

Index: Source/core/editing/htmlediting.cpp
diff --git a/Source/core/editing/htmlediting.cpp b/Source/core/editing/htmlediting.cpp
index f5105c870c4a4fa7529aebaaa69ce1fdc0634234..27e7d29eed60c211aef7e3510f7120dbc0ed1e03 100644
--- a/Source/core/editing/htmlediting.cpp
+++ b/Source/core/editing/htmlediting.cpp
@@ -822,17 +822,17 @@ PassRefPtrWillBeRawPtr<HTMLBRElement> createBreakElement(Document& document)
     return HTMLBRElement::create(document);
 }
 
-PassRefPtrWillBeRawPtr<HTMLElement> createOrderedListElement(Document& document)
+PassRefPtrWillBeRawPtr<HTMLOListElement> createOrderedListElement(Document& document)
 {
     return HTMLOListElement::create(document);
 }
 
-PassRefPtrWillBeRawPtr<HTMLElement> createUnorderedListElement(Document& document)
+PassRefPtrWillBeRawPtr<HTMLUListElement> createUnorderedListElement(Document& document)
 {
     return HTMLUListElement::create(document);
 }
 
-PassRefPtrWillBeRawPtr<HTMLElement> createListItemElement(Document& document)
+PassRefPtrWillBeRawPtr<HTMLLIElement> createListItemElement(Document& document)
 {
     return HTMLLIElement::create(document);
 }