https://bugs.webkit.org/show_bug.cgi?id=76644

https://bugs.webkit.org/show_bug.cgi?id=76644

Before landing support for centering, fix the keyword value to match the latest draft.
The new keyword is "contain" instead of "bounds."

Revised the existing parsing tests to reflect the updated value.

Reviewed by Dan Bernstein.

Source/WebCore:

* css/CSSParser.cpp:
(WebCore::CSSParser::parseValue):
* css/CSSPrimitiveValueMappings.h:
(WebCore::CSSPrimitiveValue::CSSPrimitiveValue):
(WebCore::CSSPrimitiveValue::operator LineGridSnap):
* css/CSSValueKeywords.in:
* rendering/style/RenderStyleConstants.h:

LayoutTests:

* fast/line-grid/line-grid-snap-parsing-expected.txt:
* fast/line-grid/script-tests/line-grid-snap-parsing.js:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@105429 268f45cc-cd09-0410-ab3c-d52691b4dbfc