[Password Generation] Disable button titles calculation in Beta, Stable

Button titles are not used in Beta, Stable channels at the moment. They will be crowdsourced later (as a part of crbug.com/896719).
Button titles inference is expensive, especially, for <form>less forms. See the metric PasswordManager.ButtonTitlePerformance.NoFormTag. This will be fixed as a part of new parser refactoring.
This CL temporarly disables button titles before branch point.

Bug: 910546
Change-Id: I55ac7d3bcbdc895e165cd3a46288fe089b558967
Reviewed-on: https://chromium-review.googlesource.com/c/1432854
Commit-Queue: Maxim Kolosovskiy <kolos@chromium.org>
Commit-Queue: Vadym Doroshenko <dvadym@chromium.org>
Auto-Submit: Maxim Kolosovskiy <kolos@chromium.org>
Reviewed-by: Vadym Doroshenko <dvadym@chromium.org>
Cr-Commit-Position: refs/heads/master@{#625600}
1 file changed