https://bugs.webkit.org/show_bug.cgi?id=124480

Reviewed by Tim Horton.

Though there are toHTMLFoo(), some places are still using static_cast<>.
Additionally, toHTMLBodyElement() is supported from now.

No new tests, no behavior changes.

* accessibility/AccessibilityNodeObject.cpp:
(WebCore::AccessibilityNodeObject::isRequired):
* accessibility/AccessibilityTable.cpp:
(WebCore::AccessibilityTable::isDataTable):
* bindings/js/JSHTMLFrameSetElementCustom.cpp:
(WebCore::JSHTMLFrameSetElement::nameGetter):
* bindings/js/JSPluginElementFunctions.cpp:
(WebCore::pluginInstance):
* dom/Document.cpp:
(WebCore::Document::openSearchDescriptionURL):
(WebCore::Document::iconURLs):
* dom/DocumentStyleSheetCollection.cpp:
(WebCore::DocumentStyleSheetCollection::collectActiveStyleSheets):
* editing/ReplaceSelectionCommand.cpp:
(WebCore::ReplaceSelectionCommand::makeInsertedContentRoundTrippableWithHTMLTreeBuilder):
* editing/ios/EditorIOS.mm:
(WebCore::Editor::setTextAlignmentForChangedBaseWritingDirection):
* html/HTMLBodyElement.h:
* html/HTMLDocument.cpp:
(WebCore::HTMLDocument::bgColor):
(WebCore::HTMLDocument::setBgColor):
(WebCore::HTMLDocument::fgColor):
(WebCore::HTMLDocument::setFgColor):
(WebCore::HTMLDocument::alinkColor):
(WebCore::HTMLDocument::setAlinkColor):
(WebCore::HTMLDocument::linkColor):
(WebCore::HTMLDocument::setLinkColor):
(WebCore::HTMLDocument::vlinkColor):
(WebCore::HTMLDocument::setVlinkColor):
* html/HTMLEmbedElement.cpp:
(WebCore::HTMLEmbedElement::rendererIsNeeded):
* html/HTMLFormControlElement.cpp:
(WebCore::HTMLFormControlElement::updateAncestorDisabledState):
(WebCore::HTMLFormControlElement::enclosingFormControlElement):
* html/HTMLFormElement.cpp:
(WebCore::submitElementFromEvent):
* html/HTMLImageLoader.cpp:
(WebCore::HTMLImageLoader::notifyFinished):
* html/HTMLLegendElement.cpp:
(WebCore::HTMLLegendElement::virtualForm):
* html/RadioNodeList.cpp:
(WebCore::RadioNodeList::checkElementMatchesRadioNodeListFilter):
* inspector/InspectorDOMAgent.cpp:
(WebCore::InspectorDOMAgent::buildObjectForNode):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@159416 268f45cc-cd09-0410-ab3c-d52691b4dbfc