Remove the border around the wrench icon on notification balloons (Windows).
Remove the border around the wrench icon on notification balloons (Windows).

BUG=52545
TEST=notifications on windows

Review URL: http://codereview.chromium.org/3311006

git-svn-id: http://src.chromium.org/svn/trunk/src@58260 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: b4313d8cfade14485f7796e779883cb16d4c0817
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