REGRESSION (r97745): Transitions don't work on links

Source/WebCore: 

Reviewed by Andreas Kling.

Test: transitions/visited-link-color.html
        
Since visited link colors are now part of the RenderStyle, they need to be transitioned
along with the corresponding regular colors.

* page/animation/AnimationBase.cpp:
(WebCore::PropertyWrapperVisitedAffectedColor::PropertyWrapperVisitedAffectedColor):
(WebCore::PropertyWrapperVisitedAffectedColor::equals):
(WebCore::PropertyWrapperVisitedAffectedColor::blend):
(WebCore::AnimationBase::ensurePropertyMap):
        
    Add new wrapper class that applies both regular and visited color.
        
* rendering/style/RenderStyle.h:
(WebCore::InheritedFlags::visitedLinkColor):
(WebCore::InheritedFlags::visitedLinkBackgroundColor):
(WebCore::InheritedFlags::visitedLinkBorderLeftColor):
(WebCore::InheritedFlags::visitedLinkBorderRightColor):
(WebCore::InheritedFlags::visitedLinkBorderBottomColor):
(WebCore::InheritedFlags::visitedLinkBorderTopColor):
(WebCore::InheritedFlags::visitedLinkOutlineColor):
(WebCore::InheritedFlags::visitedLinkColumnRuleColor):
(WebCore::InheritedFlags::visitedLinkTextEmphasisColor):
(WebCore::InheritedFlags::visitedLinkTextFillColor):
(WebCore::InheritedFlags::visitedLinkTextStrokeColor):
        
    Add accessors.
        
* rendering/style/StyleRareNonInheritedData.cpp:
(WebCore::StyleRareNonInheritedData::StyleRareNonInheritedData):
        
    Opportunistic fix. Don't know how to test.

LayoutTests: 

Reviewed by Andreas Kling.
        
Unfortunately the automatic test provides code coverage only as reading back the properties
from the style always gives back non-visited values. The bug is visible running the test
manually.

* transitions/visited-link-color-expected.txt: Added.
* transitions/visited-link-color.html: Added.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@103192 268f45cc-cd09-0410-ab3c-d52691b4dbfc