Increase the current version of the history index DBs, because of the switch from fts2 to fts3.
Increase the current version of the history index DBs, because of the switch from fts2 to fts3.

BUG=none
TEST=none


Review URL: http://codereview.chromium.org/2825037

git-svn-id: http://src.chromium.org/svn/trunk/src@51677 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: f1e7ca6bbe18b49c626d174573d30ba9e30ade31
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