It's impossible to sync by default on Windows and has been since this was
added: https://www.google.com/search?q=chromium-dev+nag_max

Most recently: https://groups.google.com/a/chromium.org/forum/#!topic/chromium-dev/CEpATyu9udc

So, remove it. If someone needs it they can figure out a more targeted
implementation.

Keep --no-nag-max for backwards compat so that bot scripts won't fail out.
I'll remove it from bot scripts after this has baked a while, and then
come back and remove the option.

R=iannucci@chromium.org

Review URL: https://chromiumcodereview.appspot.com/24950002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@225730 0039d316-1c4b-4281-b951-d872f2087c98