Reduce PluginProcess lifetime.
<rdar://problem/12465479> and https://bugs.webkit.org/show_bug.cgi?id=113523

Reviewed by Sam Weinig.

Lower the minimum process lifetime from 30 minutes to 2 minutes.
Lower the "shutdown after last plugin goes away" period from 10 minutes to 1 minute.

* UIProcess/Plugins/PluginProcessProxy.cpp:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147138 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Unreviewed. Unskip some layout test folder on Windows port.

* platform/win/TestExpectations:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147139 268f45cc-cd09-0410-ab3c-d52691b4dbfc