Restore disable-sync flag.
Restore disable-sync flag.

r52288 accidentally nuked the --disable-sync command line flag, make it work
again.

BUG=none
TEST=Starting with --disable-sync should actually disable sync

Review URL: http://codereview.chromium.org/2943016

git-svn-id: http://src.chromium.org/svn/trunk/src@52466 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 245da9a5691c773c87cf5d9a9415ec064477e073
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