Have CommandCloseTabsOpenedBy iterate through the tabs in reverse order to avoid race conditions with tab closing now that it's async.
Have CommandCloseTabsOpenedBy iterate through the tabs in reverse order to avoid race conditions with tab closing now that it's async.

BUG=1303289

git-svn-id: http://src.chromium.org/svn/trunk/src@216 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 7f72846282af637f95b3a160c66f922b7590b65d
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