Move smart deploy to tristate.

BUG=

Review URL: https://codereview.chromium.org/1149383006

Cr-Commit-Position: refs/heads/master@{#333058}
const GURL& GetOverrideContentUrl() {
  return g_override_content_url.Get();
}

const GURL& GetOverrideContentUrl() {
  return g_override_content_url.Get();
}
