Reviewed by Dirk Schulze.

        Window size changes + resources on absolute sized content leads to pixelation
        https://bugs.webkit.org/show_bug.cgi?id=43921

        Avoid pixelation when using resources on absolute sized objects. Be sure to invalidate the used resources if window size changes.
        Otherwhise masks etc. will be scaled up and pixelate. As nice side-effect, this fixes run-webkit-tests --singly svg/W3C-SVG-1.1, which
        used to produce wrong results for the gradient tests, as the window size change from 800x600 for 480x360 (svg/W3C-SVG-1.1 specific DRT quirk)
        didn't invalidate the resources.

        Renamed invalidateClient -> removeClientFromCache and invalidateClients -> removeAllClientsFromCache.
        Add a boolean "markForInvalidation" parameter, that controls wheter the clients should be marked for repaint/boundaries invalidation/layout
        or wheter we only want to notify the parents that the resource changed, to avoid doing unncessary work in SVGRenderSupport::layoutChildren.

        Test: svg/custom/absolute-sized-content-with-resources.xhtml

        * rendering/RenderSVGGradientStop.cpp:
        (WebCore::RenderSVGGradientStop::styleDidChange): Don't do anything for StyleDifferenceEqual.
        * rendering/RenderSVGImage.cpp:
        (WebCore::RenderSVGImage::imageChanged):
        * rendering/RenderSVGResource.cpp:
        (WebCore::RenderSVGResource::markForLayoutAndParentResourceInvalidation):
        * rendering/RenderSVGResource.h:
        * rendering/RenderSVGResourceClipper.cpp:
        (WebCore::RenderSVGResourceClipper::removeAllClientsFromCache):
        (WebCore::RenderSVGResourceClipper::removeClientFromCache):
        * rendering/RenderSVGResourceClipper.h:
        * rendering/RenderSVGResourceContainer.cpp:
        (WebCore::RenderSVGResourceContainer::layout):
        (WebCore::RenderSVGResourceContainer::idChanged):
        (WebCore::RenderSVGResourceContainer::markAllClientsForInvalidation):
        (WebCore::RenderSVGResourceContainer::markClientForInvalidation):
        * rendering/RenderSVGResourceContainer.h:
        (WebCore::RenderSVGResourceContainer::):
        * rendering/RenderSVGResourceFilter.cpp:
        (WebCore::RenderSVGResourceFilter::removeAllClientsFromCache):
        (WebCore::RenderSVGResourceFilter::removeClientFromCache):
        (WebCore::RenderSVGResourceFilter::postApplyResource):
        * rendering/RenderSVGResourceFilter.h:
        * rendering/RenderSVGResourceGradient.cpp:
        (WebCore::RenderSVGResourceGradient::removeAllClientsFromCache):
        (WebCore::RenderSVGResourceGradient::removeClientFromCache):
        (WebCore::RenderSVGResourceGradient::applyResource):
        * rendering/RenderSVGResourceGradient.h:
        * rendering/RenderSVGResourceMarker.cpp:
        (WebCore::RenderSVGResourceMarker::layout):
        (WebCore::RenderSVGResourceMarker::removeAllClientsFromCache):
        (WebCore::RenderSVGResourceMarker::removeClientFromCache):
        * rendering/RenderSVGResourceMarker.h:
        * rendering/RenderSVGResourceMasker.cpp:
        (WebCore::RenderSVGResourceMasker::removeAllClientsFromCache):
        (WebCore::RenderSVGResourceMasker::removeClientFromCache):
        * rendering/RenderSVGResourceMasker.h:
        * rendering/RenderSVGResourcePattern.cpp:
        (WebCore::RenderSVGResourcePattern::removeAllClientsFromCache):
        (WebCore::RenderSVGResourcePattern::removeClientFromCache):
        (WebCore::RenderSVGResourcePattern::applyResource):
        * rendering/RenderSVGResourcePattern.h:
        * rendering/RenderSVGResourceSolidColor.h:
        (WebCore::RenderSVGResourceSolidColor::removeAllClientsFromCache):
        (WebCore::RenderSVGResourceSolidColor::removeClientFromCache):
        * rendering/SVGRenderSupport.cpp:
        (WebCore::invalidateResourcesOfChildren): Add new helper funtion recursively invalidating resources of a sub render tree.
        (WebCore::SVGRenderSupport::layoutChildren): Keep track of all objects that didn't need layout, as we still have to invalidate their resources, if window size changes.
        * rendering/SVGResources.cpp:
        (WebCore::SVGResources::removeClientFromCache):
        (WebCore::SVGResources::resourceDestroyed):
        * rendering/SVGResources.h:
        * rendering/SVGResourcesCache.cpp:
        (WebCore::SVGResourcesCache::clientLayoutChanged):

2010-08-12  Nikolas Zimmermann  <nzimmermann@rim.com>

        Reviewed by Dirk Schulze.

        Window size changes + resources on absolute sized content leads to pixelation
        https://bugs.webkit.org/show_bug.cgi?id=43921

        * platform/mac/svg/custom/absolute-sized-content-with-resources-expected.checksum: Added.
        * platform/mac/svg/custom/absolute-sized-content-with-resources-expected.png: Added.
        * platform/mac/svg/custom/absolute-sized-content-with-resources-expected.txt: Added.
        * svg/custom/absolute-sized-content-with-resources.xhtml: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@65310 268f45cc-cd09-0410-ab3c-d52691b4dbfc