https://bugs.webkit.org/show_bug.cgi?id=69284

Patch by Florin Malita <fmalita@google.com> on 2012-01-21
Reviewed by Nikolas Zimmermann.

Source/WebCore:

Test: svg/custom/use-crash-pending-resource.svg

The crash is caused by assumptions in SVGUseElement that xlink:href is the only
pending resource. This patch adds support for dealing with multiple pending resources.

* rendering/svg/RenderSVGResourceContainer.cpp:
(WebCore::RenderSVGResourceContainer::registerResource):
* svg/SVGDocumentExtensions.cpp:
(WebCore::SVGDocumentExtensions::hasPendingResource):
(WebCore::SVGDocumentExtensions::isElementPendingResources):
(WebCore::SVGDocumentExtensions::isElementPendingResource):
(WebCore::SVGDocumentExtensions::removePendingResourceForElement):
* svg/SVGDocumentExtensions.h:
* svg/SVGStyledElement.cpp:
(WebCore::SVGStyledElement::buildPendingResourcesIfNeeded):
(WebCore::SVGStyledElement::clearHasPendingResourcesIfPossible):
Renamed SVGDocumentExtensions::hasPendingResources -> Renamed SVGDocumentExtensions::hasPendingResource.
Renamed SVGDocumentExtensions::isElementInPendingResources -> SVGDocumentExtensions::isElementPendingResources.
Added support for querying and removing pending resources for a specific element.

* svg/SVGUseElement.cpp:
(WebCore::SVGUseElement::svgAttributeChanged):
(WebCore::SVGUseElement::buildPendingResource):
Refactored to support multiple pending resources.

LayoutTests:

* svg/custom/use-crash-pending-resource-expected.txt: Added.
* svg/custom/use-crash-pending-resource.svg: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@105573 268f45cc-cd09-0410-ab3c-d52691b4dbfc