Open the home page on launch even when there are pinned tabs.
Open the home page on launch even when there are pinned tabs.

BUG=55153
TEST=manually, see bug

Review URL: http://codereview.chromium.org/6602002

git-svn-id: http://src.chromium.org/svn/trunk/src@76245 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 2c2c0314d6c28acb76acffbfe86d9d7dce6d5cd9
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