Disable failing notifcations tests on chromeos
Disable failing notifcations tests on chromeos

I've tried on 0.13.506.0
I'm pretty sure they were working fine a few builds ago (from last week)

BUG=81624

R=dennisjeffrey@chromium.org
TEST=

Review URL: http://codereview.chromium.org/6990001

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@84721 0039d316-1c4b-4281-b951-d872f2087c98

yitian134/chromium,yitian134/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,yitian134/chromium,adobe/chromium,ropik/chromium,gavinp/chromium,ropik/chromium,adobe/chromium,gavinp/chromium,yitian134/chromium,ropik/chromium,ropik/chromium,gavinp/chromium,gavinp/chromium,yitian134/chromium,gavinp/chromium,adobe/chromium,yitian134/chromium,gavinp/chromium,yitian134/chromium,adobe/chromium,adobe/chromium,ropik/chromium,adobe/chromium,ropik/chromium,adobe/chromium,yitian134/chromium,yitian134/chromium,ropik/chromium,adobe/chromium,gavinp/chromium,gavinp/chromium,adobe/chromium,ropik/chromium,yitian134/chromium,ropik/chromium,gavinp/chromium