PasswordManagerSettingsBehaviourChange is a currently sleeping experiment related to the launch bug 529289.

The experiment is about changing the effect of the password manager setting: currently the setting controls saving of passwords only, filling works all the time (as long as some passwords have been stored previously). The new behaviour was meant to be controlling both saving and filling.

It is not clear if and when this experiment gets revived, so we should clean-up the code. If we need it back, we should make it a base::Feature in components/password_manager/core/common/password_manager_features.* anyway.

The only place where this experiment seemed to have controlled the code is in ChromePasswordManagerClient::IsFillingEnabledForCurrentPage.