[GTK] The style of visited links doesn't change in WebKit2
https://bugs.webkit.org/show_bug.cgi?id=112175

Reviewed by Benjamin Poulain.

The problem is that visited links were not tracked by the web
process. There's a web process initial parameter to set whether
web process should track visited links or not and it's disabled by
default.

* UIProcess/gtk/WebContextGtk.cpp:
(WebKit::WebContext::platformInitializeWebProcess): Always set
shouldTrackVisitedLinks to true.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148267 268f45cc-cd09-0410-ab3c-d52691b4dbfc
[Qt] Unreviewed gardening.

* platform/qt/TestExpectations:
* platform/qt/fast/js/global-constructors-expected.txt: Rebaselining after r148236.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148268 268f45cc-cd09-0410-ab3c-d52691b4dbfc