[css-masking] Unprefix -webkit-clip-path

[css-masking] Unprefix -webkit-clip-path
https://bugs.webkit.org/show_bug.cgi?id=187888

Reviewed by Simon Fraser.

LayoutTests/imported/mozilla:

Integrated test expectations do not match the actual expected
behavior. The reason is that the expectation files reference
resources from different documents - which is not supported by
WebKit. Since unprefixed clip-path wasn't supported either
the test passed.

* svg/svg-integration/clipPath-html-01-expected.xhtml:
* svg/svg-integration/clipPath-html-02-expected.xhtml:
* svg/svg-integration/clipPath-html-02.xhtml:
* svg/svg-integration/clipPath-html-03-expected.xhtml:
* svg/svg-integration/clipPath-html-04-expected.xhtml:
* svg/svg-integration/clipPath-html-05-expected.xhtml:
* svg/svg-integration/clipPath-html-06-expected.xhtml:

LayoutTests/imported/w3c:

Test started passing. Updating test results.

* web-platform-tests/css/css-masking/parsing/clip-path-computed-expected.txt:
* web-platform-tests/css/css-masking/parsing/clip-path-valid-expected.txt:
* web-platform-tests/css/css-shapes/basic-shape-circle-ellipse-serialization-expected.txt:
* web-platform-tests/css/css-shapes/shape-outside/formatting-context/shape-outside-formatting-context.tentative-expected.html:
        Test result is incorrect: Doesn't test the shifing of content when shape-outside is set.
* web-platform-tests/css/css-shapes/shape-outside/formatting-context/shape-outside-formatting-context.tentative.html:

Source/WebCore:

Unprefix -webkit-clip-path. Make clip-path alias the prefixed version.

We already have a wide variaty of pre-/unprexied clip-path tests.

* css/CSSComputedStyleDeclaration.cpp:
(WebCore::ComputedStyleExtractor::valueForPropertyinStyle):
* css/CSSProperties.json:
* css/SVGCSSComputedStyleDeclaration.cpp:
(WebCore::ComputedStyleExtractor::svgPropertyValue):
* css/parser/CSSPropertyParser.cpp:
(WebCore::CSSPropertyParser::parseSingleValue):
* page/animation/CSSPropertyAnimation.cpp:
(WebCore::CSSPropertyAnimationWrapperMap::CSSPropertyAnimationWrapperMap):
* rendering/style/SVGRenderStyle.h:
(WebCore::SVGRenderStyle::initialShadow):
(WebCore::SVGRenderStyle::y const):
(WebCore::SVGRenderStyle::initialClipperResource): Deleted.
(WebCore::SVGRenderStyle::clipperResource const): Deleted.
(WebCore::SVGRenderStyle::hasClipper const): Deleted.
(WebCore::SVGRenderStyle::setClipperResource): Deleted.
* rendering/style/SVGRenderStyleDefs.cpp:
(WebCore::StyleResourceData::StyleResourceData):
(WebCore::StyleResourceData::operator== const):
* rendering/style/SVGRenderStyleDefs.h:
* rendering/style/WillChangeData.cpp:
(WebCore::WillChangeData::propertyCreatesStackingContext):
* rendering/svg/RenderSVGResourceClipper.cpp:
(WebCore::RenderSVGResourceClipper::pathOnlyClipping):
* rendering/svg/SVGRenderTreeAsText.cpp:
(WebCore::writeResources):
* rendering/svg/SVGResources.cpp:
(WebCore::SVGResources::buildCachedResources):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@251776 268f45cc-cd09-0410-ab3c-d52691b4dbfc