Fix up bookmark bar event stuff.
Fix up bookmark bar event stuff.

Make instructions a drag target and also make it possible to right click on it.

Also fix http://crbug.com/18967

Also report the right action in the drag motion handler (MOVE vs. COPY).

BUG=18967

Review URL: http://codereview.chromium.org/164295

git-svn-id: http://src.chromium.org/svn/trunk/src@23003 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: fe32a0728922dff13760417f2a54451feca5bcef
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