Crash when setting 'column-span' CSS property to 'calc(2 * 3)'
https://bugs.webkit.org/show_bug.cgi?id=139170

Reviewed by Darin Adler.

Source/WebCore:

Add support for calculated values for 'column-span' and 'column-width'
CSS properties. Previously, these were not working in release builds
and hitting assertions in debug builds.

Tests: fast/css/column-width-calculated-value.html
       fast/css/webkit-column-span-calculated-value.html

* css/CSSParser.cpp:
(WebCore::CSSParser::parseValue):

LayoutTests:

Add layout tests to test calculated values for 'column-span'
and 'column-width' CSS properties.

* fast/css/column-width-calculated-value-expected.txt: Added.
* fast/css/column-width-calculated-value.html: Added.
* fast/css/webkit-column-span-calculated-value-expected.txt: Added.
* fast/css/webkit-column-span-calculated-value.html: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@176671 268f45cc-cd09-0410-ab3c-d52691b4dbfc
7 files changed