Disable PluginTest.Refresh because it's crashing on the bots for unknown reasons.  I can't repro the crash on the desktop.
Disable PluginTest.Refresh because it's crashing on the bots for
unknown reasons.  I can't repro the crash on the desktop.

BUG=30346
TBR=senorblanco

Review URL: http://codereview.chromium.org/503006

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@34517 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser