getPropertyValue for -webkit-marquee returns null, should compute the shorthand value
https://bugs.webkit.org/show_bug.cgi?id=110816

Patch by Uday Kiran <udaykiran@motorola.com> on 2013-02-26
Reviewed by Alexander Pavlov.

Source/WebCore:

Compute the shorthand value for '-webkit-marquee' specified in CSS.

Test: fast/css/getPropertyValue-webkit-marquee.html

* css/StylePropertySet.cpp:
(WebCore::StylePropertySet::getPropertyValue):

LayoutTests:

Added testcases to check getPropertyValue for -webkit-marquee shorthand.

* fast/css/getPropertyValue-webkit-marquee-expected.txt: Added.
* fast/css/getPropertyValue-webkit-marquee.html: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@144144 268f45cc-cd09-0410-ab3c-d52691b4dbfc