B=1302955 R=sky attempt to bandaid situation where tab_data_ and child list can get out of sync
B=1302955 R=sky attempt to bandaid situation where tab_data_ and child list can get out of sync

git-svn-id: http://src.chromium.org/svn/trunk/src@443 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 489eba31b836f12ed2089fb0f662e7944c59d60e
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