Renabling the NPAPIVisiblePluginTester.OpenPopupWindowWithPlugin test. This test was marked as DISABLED as it caused crashes. I could not repro the failures and looking at the code did not reveal anything suspicious at this point. I am enabling this test and marking it as FLAKY  for now. Will monitor the builders to see if the crash recurs.
Renabling the NPAPIVisiblePluginTester.OpenPopupWindowWithPlugin test. This test was marked
as DISABLED as it caused crashes. I could not repro the failures and looking at the code did
not reveal anything suspicious at this point. I am enabling this test and marking it as FLAKY 
for now. Will monitor the builders to see if the crash recurs.

Bug=17645

Review URL: http://codereview.chromium.org/3376002

git-svn-id: http://src.chromium.org/svn/trunk/src@59279 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: d12c9f227b734d54e02c798a4ea8a7055a1f5e81
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser