Rollback option put behind the flag.

BUG=368860

Review URL: https://codereview.chromium.org/267393011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@269753 0039d316-1c4b-4281-b951-d872f2087c98
void ResetScreenHandler::RegisterMessages() {
  AddCallback("cancelOnReset", &ResetScreenHandler::HandleOnCancel);
  AddCallback("restartOnReset", &ResetScreenHandler::HandleOnRestart);
  AddCallback("powerwashOnReset", &ResetScreenHandler::HandleOnPowerwash);
  AddCallback("resetOnLearnMore", &ResetScreenHandler::HandleOnLearnMore);
}

void ResetScreenHandler::RegisterMessages() {
  AddCallback("cancelOnReset", &ResetScreenHandler::HandleOnCancel);
  AddCallback("restartOnReset", &ResetScreenHandler::HandleOnRestart);
  AddCallback("powerwashOnReset", &ResetScreenHandler::HandleOnPowerwash);
  AddCallback("resetOnLearnMore", &ResetScreenHandler::HandleOnLearnMore);
}
