GTK: don't show drag indicator for invalid drags over recently added/search rows in bookmark manager.
GTK: don't show drag indicator for invalid drags over recently added/search rows in bookmark manager.

BUG=32239
TEST=manual

Review URL: http://codereview.chromium.org/587010

git-svn-id: http://src.chromium.org/svn/trunk/src@38535 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 053beed4768c8382ccccd7ebf1d074115a6659f7
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