Use IGNORE_EXCEPTION for initialized, but unused, ExceptionCodes.
https://bugs.webkit.org/show_bug.cgi?id=109295

Reviewed by Darin Adler.

The monster patch in http://wkbug.com/108771 missed an entire class of
ignored exceptions. It only dealt with call sites that never initialized
the ExceptionCode variable, on the assumption that only such call sites
would ignore the variable's value.

That was a flawed assumption: a large number of sites that initialize the
ExceptionCode to 0 ignore it regardless. This patch deals with the
almost-as-large set of callsites that initialize the variable, pass it to
a function, and then never touch it again.

* Modules/indexeddb/IDBDatabase.cpp:
(WebCore::IDBDatabase::forceClose):
* accessibility/AccessibilityRenderObject.cpp:
(WebCore::AccessibilityRenderObject::ariaSelectedTextRange):
(WebCore::AccessibilityRenderObject::visiblePositionForIndex):
(WebCore::AccessibilityRenderObject::indexForVisiblePosition):
* accessibility/atk/WebKitAccessibleInterfaceText.cpp:
(getSelectionOffsetsForObject):
* accessibility/atk/WebKitAccessibleUtil.cpp:
(selectionBelongsToObject):
* dom/Node.cpp:
(WebCore::Node::textRects):
* editing/DeleteButtonController.cpp:
(WebCore::DeleteButtonController::hide):
* editing/EditingStyle.cpp:
(WebCore::EditingStyle::styleAtSelectionStart):
* editing/Editor.cpp:
(WebCore::Editor::canDeleteRange):
(WebCore::Editor::pasteAsPlainText):
(WebCore::Editor::pasteAsFragment):
(WebCore::Editor::shouldDeleteRange):
(WebCore::Editor::dispatchCPPEvent):
(WebCore::Editor::setComposition):
(WebCore::Editor::advanceToNextMisspelling):
(WebCore::isFrameInRange):
* editing/EditorCommand.cpp:
(WebCore::expandSelectionToGranularity):
* editing/MergeIdenticalElementsCommand.cpp:
(WebCore::MergeIdenticalElementsCommand::doApply):
* editing/SplitElementCommand.cpp:
(WebCore::SplitElementCommand::doUnapply):
* editing/SplitTextNodeCommand.cpp:
(WebCore::SplitTextNodeCommand::doApply):
* editing/TextCheckingHelper.cpp:
(WebCore::expandToParagraphBoundary):
(WebCore::TextCheckingHelper::findFirstMisspellingOrBadGrammar):
(WebCore::TextCheckingHelper::isUngrammatical):
(WebCore::TextCheckingHelper::guessesForMisspelledOrUngrammaticalRange):
* editing/TextInsertionBaseCommand.cpp:
(WebCore::dispatchBeforeTextInsertedEvent):
(WebCore::canAppendNewLineFeedToSelection):
* editing/TextIterator.cpp:
(WebCore::findPlainText):
* editing/htmlediting.cpp:
(WebCore::extendRangeToWrappingNodes):
(WebCore::isNodeVisiblyContainedWithin):
* editing/visible_units.cpp:
(WebCore::nextBoundary):
* html/FileInputType.cpp:
(WebCore::FileInputType::createShadowSubtree):
* html/HTMLKeygenElement.cpp:
(WebCore::HTMLKeygenElement::HTMLKeygenElement):
* html/HTMLScriptElement.cpp:
(WebCore::HTMLScriptElement::setText):
* html/HTMLTitleElement.cpp:
(WebCore::HTMLTitleElement::setText):
* html/HTMLTrackElement.cpp:
(WebCore::HTMLTrackElement::didCompleteLoad):
* html/RangeInputType.cpp:
(WebCore::RangeInputType::createShadowSubtree):
* html/SearchInputType.cpp:
(WebCore::SearchInputType::createShadowSubtree):
* html/TextFieldInputType.cpp:
(WebCore::TextFieldInputType::createShadowSubtree):
* html/track/TextTrackList.cpp:
(TextTrackList::asyncEventTimerFired):
* inspector/DOMPatchSupport.cpp:
(WebCore::DOMPatchSupport::patchDocument):
* inspector/InspectorDatabaseAgent.cpp:
(WebCore):
* inspector/InspectorFileSystemAgent.cpp:
(WebCore):
* page/DOMSelection.cpp:
(WebCore::DOMSelection::addRange):
* page/DragController.cpp:
(WebCore::DragController::dispatchTextInputEventFor):
* page/EventHandler.cpp:
(WebCore::EventHandler::dispatchMouseEvent):
(WebCore::EventHandler::handleTouchEvent):
* page/FrameActionScheduler.cpp:
(WebCore::EventFrameAction::fire):
* platform/graphics/avfoundation/objc/MediaPlayerPrivateAVFoundationObjC.mm:
(WebCore::MediaPlayerPrivateAVFoundationObjC::shouldWaitForLoadingOfResource):
* svg/SVGDocument.cpp:
(WebCore::SVGDocument::dispatchZoomEvent):
(WebCore::SVGDocument::dispatchScrollEvent):
* svg/SVGLength.cpp:
(WebCore::SVGLength::SVGLength):
(WebCore::SVGLength::value):
* xml/parser/XMLDocumentParser.cpp:
(WebCore::XMLDocumentParser::exitText):
* xml/parser/XMLDocumentParserQt.cpp:
(WebCore::XMLDocumentParser::parse):
(WebCore::XMLDocumentParser::startDocument):
(WebCore::XMLDocumentParser::parseCharacters):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@142375 268f45cc-cd09-0410-ab3c-d52691b4dbfc