Adding a comment to explain a non-obvious fallthrough to another case statement.
Adding a comment to explain a non-obvious fallthrough to another case statement.

BUG=None
TEST=None
Review URL: http://codereview.chromium.org/6675046

git-svn-id: http://src.chromium.org/svn/trunk/src@79983 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 0bd86748bcfa4b6b17a159629c7af38473570334
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