<http://webkit.org/b/85890>

Reviewed by Anders Carlsson.

Change isURLAttribute(Attribute*) to isURLAttribute(const Attribute&) to enforce
the fact that the Attribute can't be null, and shouldn't be mutated, at compile-time.
Also sprinkle OVERRIDE while we're at it.

* dom/Element.cpp:
(WebCore::Element::getURLAttribute):
(WebCore::Element::getNonEmptyURLAttribute):
* dom/Element.h:
(WebCore::Element::isURLAttribute):
* editing/MarkupAccumulator.cpp:
(WebCore::MarkupAccumulator::appendQuotedURLAttributeValue):
(WebCore::MarkupAccumulator::appendAttribute):
* editing/markup.cpp:
(WebCore::completeURLs):
* html/HTMLAnchorElement.cpp:
(WebCore::HTMLAnchorElement::isURLAttribute):
* html/HTMLAnchorElement.h:
* html/HTMLBaseElement.cpp:
(WebCore::HTMLBaseElement::isURLAttribute):
* html/HTMLBaseElement.h:
* html/HTMLBodyElement.cpp:
(WebCore::HTMLBodyElement::isURLAttribute):
* html/HTMLBodyElement.h:
* html/HTMLButtonElement.cpp:
(WebCore::HTMLButtonElement::isURLAttribute):
* html/HTMLButtonElement.h:
* html/HTMLElement.cpp:
(WebCore::HTMLElement::isURLAttribute):
* html/HTMLElement.h:
* html/HTMLEmbedElement.cpp:
(WebCore::HTMLEmbedElement::isURLAttribute):
* html/HTMLEmbedElement.h:
* html/HTMLFormElement.cpp:
(WebCore::HTMLFormElement::isURLAttribute):
* html/HTMLFormElement.h:
* html/HTMLFrameElementBase.cpp:
(WebCore::HTMLFrameElementBase::isURLAttribute):
* html/HTMLFrameElementBase.h:
(HTMLFrameElementBase):
* html/HTMLHtmlElement.cpp:
(WebCore::HTMLHtmlElement::isURLAttribute):
* html/HTMLHtmlElement.h:
* html/HTMLImageElement.cpp:
(WebCore::HTMLImageElement::isURLAttribute):
* html/HTMLImageElement.h:
* html/HTMLInputElement.cpp:
(WebCore::HTMLInputElement::isURLAttribute):
* html/HTMLInputElement.h:
* html/HTMLLinkElement.cpp:
(WebCore::HTMLLinkElement::isURLAttribute):
* html/HTMLLinkElement.h:
* html/HTMLMediaElement.cpp:
(WebCore::HTMLMediaElement::isURLAttribute):
* html/HTMLMediaElement.h:
* html/HTMLModElement.cpp:
(WebCore::HTMLModElement::isURLAttribute):
* html/HTMLModElement.h:
* html/HTMLObjectElement.cpp:
(WebCore::HTMLObjectElement::isURLAttribute):
* html/HTMLObjectElement.h:
* html/HTMLParamElement.cpp:
(WebCore::HTMLParamElement::isURLAttribute):
* html/HTMLParamElement.h:
* html/HTMLQuoteElement.cpp:
(WebCore::HTMLQuoteElement::isURLAttribute):
* html/HTMLQuoteElement.h:
* html/HTMLScriptElement.cpp:
(WebCore::HTMLScriptElement::isURLAttribute):
* html/HTMLScriptElement.h:
* html/HTMLSourceElement.cpp:
(WebCore::HTMLSourceElement::isURLAttribute):
* html/HTMLSourceElement.h:
* html/HTMLTableCellElement.cpp:
(WebCore::HTMLTableCellElement::isURLAttribute):
* html/HTMLTableCellElement.h:
* html/HTMLTableElement.cpp:
(WebCore::HTMLTableElement::isURLAttribute):
* html/HTMLTableElement.h:
* html/HTMLTrackElement.cpp:
(WebCore::HTMLTrackElement::isURLAttribute):
* html/HTMLTrackElement.h:
* html/HTMLVideoElement.cpp:
(WebCore::HTMLVideoElement::isURLAttribute):
* html/HTMLVideoElement.h:
* svg/SVGScriptElement.cpp:
(WebCore::SVGScriptElement::isURLAttribute):
* svg/SVGScriptElement.h:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@116430 268f45cc-cd09-0410-ab3c-d52691b4dbfc