Mark the flaky iframe post test as such.
Mark the flaky iframe post test as such.

R=ananta
TEST=none
BUG=26372

Review URL: http://codereview.chromium.org/348026

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@30649 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