void FieldTrialSynchronizer::OnFieldTrialGroupFinalized(
const std::string& field_trial_name,
const std::string& group_name) {
+ CHECK(!field_trial_name.empty() && !group_name.empty());
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(&FieldTrialSynchronizer::NotifyAllRenderers,