https://bugs.webkit.org/show_bug.cgi?id=89746

Reviewed by Levi Weintraub.

Source/WebCore: 

The combination of bidi-isolate and isolate was replaced by a single isolate-override in
http://lists.w3.org/Archives/Public/www-style/2012May/0541.html. The spec. has been updated accordingly:
http://dev.w3.org/csswg/css3-writing-modes/#unicode-bidi

To follow the specification change, added -webkit-isolate-override and removed the support for
isolate || bidi-override, simplifying the CSS parser and serializer.

Test: fast/text/bidi-override-isolate.html

* css/CSSComputedStyleDeclaration.cpp:
(WebCore::CSSComputedStyleDeclaration::getPropertyCSSValue): Removed. We can just new a CSSPrimitiveValue
constructor now.
* css/CSSParser.cpp:
(WebCore::CSSParser::parseValue):
* css/CSSPrimitiveValueMappings.h:
(WebCore::CSSPrimitiveValue::CSSPrimitiveValue): Added now that unicode-bidi always creates a signle
primitive value instead of a primitive value of css value list.
(WebCore::CSSPrimitiveValue::operator EUnicodeBidi):
* css/CSSValueKeywords.in: Added -webkit-isolate-override
* css/StyleBuilder.cpp:
(WebCore): Removed ApplyPropertyUnicodeBidi since we can use ApplyPropertyDefault now.
(WebCore::StyleBuilder::StyleBuilder): Use ApplyPropertyDefault.
* platform/text/UnicodeBidi.h: Renamed OverrideIsolate to IsolateOverride to match the spec.
(WebCore::isIsolated):
(WebCore::isOverride):
* rendering/RenderBlockLineLayout.cpp:
(WebCore::constructBidiRuns):

LayoutTests: 

Rebaseline test expectations. These tests test the new behavior and new property value -webkit-isolate-override.

* fast/css/unicode-bidi-computed-value-expected.txt:
* fast/css/unicode-bidi-computed-value.html:
* fast/text/bidi-override-isolate.html:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@126072 268f45cc-cd09-0410-ab3c-d52691b4dbfc