gtk: Do not show up a tooltip when hovering on the magnifying glass on NTP.
gtk: Do not show up a tooltip when hovering on the magnifying glass on NTP.

BUG=73252
TEST=see bug

Review URL: http://codereview.chromium.org/6507043

git-svn-id: http://src.chromium.org/svn/trunk/src@75316 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: fbcaeaaecea12951c0e10e822aa1195a084df8a6
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