DevTools: store devtools split offset only when devtools is being hidden. Otherwise any browser window closed afterwards will overwrite settings with the original ones.
DevTools: store devtools split offset only when devtools is being hidden.
Otherwise any browser window closed afterwards will overwrite settings with the original ones.

Review URL: http://codereview.chromium.org/155140

git-svn-id: http://src.chromium.org/svn/trunk/src@20026 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 6adaf39bbfd0220f15003f378920d005bafe4c82
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