GTK: Don't display bookmark right click menu when bookmark bar is hidden.
GTK: Don't display bookmark right click menu when bookmark bar is hidden.

Because the event box is still visible when the bookmark bar is hidden and the
event box is connected to the button-press-event, if you right click under the
location bar or the browser action icons, you'll show the bookmark menu even
if you have it hidden.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/1704010

git-svn-id: http://src.chromium.org/svn/trunk/src@45601 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: e3a4cfeca583663178ba91b8fd7251f8a5af7fff
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