Adopt is/toHTMLTableElement for code cleanup
https://bugs.webkit.org/show_bug.cgi?id=118393

Reviewed by Andreas Kling.

To enhance readability, this patch adopts is/toHTMLTableElement.
This also helps out to reduce duplicated use of static_cast.

* accessibility/AccessibilityRenderObject.cpp:
(WebCore::AccessibilityRenderObject::determineAccessibilityRole):
* accessibility/AccessibilityTable.cpp:
(WebCore::AccessibilityTable::isDataTable):
(WebCore::AccessibilityTable::isTableExposableThroughAccessibility):
(WebCore::AccessibilityTable::title):
* accessibility/atk/WebKitAccessibleInterfaceTable.cpp:
(webkitAccessibleTableGetCaption):
* accessibility/atk/WebKitAccessibleWrapperAtk.cpp:
(webkitAccessibleGetDescription):
* css/StyleResolver.cpp:
(WebCore::StyleResolver::adjustRenderStyle):
* dom/Position.cpp:
(WebCore::endsOfNodeAreVisuallyDistinctPositions):
* editing/DeleteSelectionCommand.cpp:
(WebCore::DeleteSelectionCommand::handleGeneralDelete):
* editing/InsertLineBreakCommand.cpp:
(WebCore::InsertLineBreakCommand::doApply):
* editing/htmlediting.cpp:
(WebCore::isNonTableCellHTMLBlockElement):
* editing/markup.cpp:
(WebCore::ancestorToRetainStructureAndAppearanceForBlock):
* html/FTPDirectoryDocument.cpp:
(WebCore::FTPDirectoryDocumentParser::loadDocumentTemplate):
(WebCore::FTPDirectoryDocumentParser::createBasicDocument):
* html/HTMLFormElement.cpp:
(WebCore::HTMLFormElement::rendererIsNeeded):
* html/HTMLTableElement.h:
(WebCore::isHTMLTableElement):
(WebCore::toHTMLTableElement):
* html/HTMLTablePartElement.cpp:
(WebCore::HTMLTablePartElement::findParentTable):
* html/HTMLTableRowElement.cpp:
(WebCore::HTMLTableRowElement::rowIndex):
* html/HTMLTableRowsCollection.cpp:
(WebCore::HTMLTableRowsCollection::HTMLTableRowsCollection):
(WebCore::HTMLTableRowsCollection::virtualItemAfter):
* html/parser/HTMLElementStack.cpp:
(WebCore::HTMLNames::isScopeMarker):
(WebCore::HTMLNames::isTableScopeMarker):
* html/parser/HTMLTreeBuilder.cpp:
(WebCore::HTMLTreeBuilder::resetInsertionModeAppropriately):
(WebCore::HTMLTreeBuilder::processCharacterBuffer):
* platform/mac/HTMLConverter.mm:
(-[WebHTMLConverter _computedStringForNode:property:]):
* rendering/RenderObject.cpp:
(WebCore::RenderObject::offsetParent):
* rendering/RenderTable.cpp:
(WebCore::RenderTable::convertStyleLogicalWidthToComputedWidth):
(WebCore::RenderTable::convertStyleLogicalHeightToComputedHeight):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@152440 268f45cc-cd09-0410-ab3c-d52691b4dbfc