https://bugs.webkit.org/show_bug.cgi?id=120393

Reviewed by Andreas Kling.

Remove Node* root versions of the iterators. 
Fix the few call sites that required them to have tighter typing.

* accessibility/AccessibilityNodeObject.cpp:
(WebCore::AccessibilityNodeObject::canvasHasFallbackContent):
(WebCore::siblingWithAriaRole):
* dom/ChildIterator.h:
(WebCore::::ChildIteratorAdapter):
(WebCore::::begin):
(WebCore::::end):
(WebCore::elementChildren):
(WebCore::childrenOfType):
* dom/DescendantIterator.h:
(WebCore::::DescendantIterator):
(WebCore::::DescendantIteratorAdapter):
(WebCore::::begin):
(WebCore::::end):
(WebCore::elementDescendants):
(WebCore::descendantsOfType):
* editing/ApplyStyleCommand.cpp:
(WebCore::dummySpanAncestorForNode):
(WebCore::ApplyStyleCommand::cleanupUnstyledAppleStyleSpans):
(WebCore::ApplyStyleCommand::applyInlineStyle):
* editing/ApplyStyleCommand.h:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@154734 268f45cc-cd09-0410-ab3c-d52691b4dbfc