[CherryPick] To paint column-rules wider than column-gap

[CherryPick] To paint column-rules wider than column-gap

[Title] [CherryPick] To paint column-rules wider than column-gap
[Issue] TWEB-1032
[Problem] If column-rule-width > column-gap, the column-rule is not painted
[Cause] WebKit ignored column-rules wider than column-gap
[Solution] Cherry-pick the opensource patch.
[Cherry-Picker] KyungTae Kim <ktf.kim@samsung.com>

WebKit ignores column-rules wider than column-gap
https://bugs.webkit.org/show_bug.cgi?id=15553

Paint column rules even if they are wider than the gap.
Rules wider than the gap should just overlap with column contents.

Patch by Morten Stenshorne <mstensho@opera.com> on 2013-02-13
Reviewed by Eric Seidel.

Source/WebCore:

Test: fast/multicol/rule-thicker-than-gap.html

* rendering/RenderBlock.cpp:
(WebCore::RenderBlock::paintColumnRules):

LayoutTests:

* fast/multicol/rule-thicker-than-gap-expected.html: Added.
* fast/multicol/rule-thicker-than-gap.html: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@142770 268f45cc-cd09-0410-ab3c-d52691b4dbfc

Change-Id: I3881829f6d2fe71236ff909699d165c1997b3664