GTK: Hide the "Other Bookmarks" button when there are no bookmarks there.

We now match the windows behaviour.

BUG=64997
TEST=As in bug.


Review URL: http://codereview.chromium.org/7312014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@91631 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed