Back end support for column-span.
Created attachment 56756 [details]
Attachment 56756 [details] did not pass style-queue:
Failed to run "['WebKitTools/Scripts/check-webkit-style', '--no-squash']" exit_code: 1
WebCore/css/CSSParser.cpp:1489: One space before end of line comments [whitespace/comments] 
Total errors found: 1 in 9 files
If any of these errors are false positives, please file a bug against check-webkit-style.
Comment on attachment 56756 [details]
+ validPrimitive = validUnit(value, FNumber | FNonNeg, m_strict) && value->fValue == 1.0;
Current style for this is “1” instead of “1.0”.
Fixed in r59968.
http://trac.webkit.org/changeset/59968 might have broken GTK Linux 32-bit Release
This patch didn’t include a ChangeLog for the LayoutTests directory and only updated the Mac-specific expected results for the getComputedStyle test. I am landing a fix for the rest.