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The Autofill.CreditCardInfoBar.Server histogram was split into {
	Autofill.CreditCardInfoBar.Server,
	Autofill.CreditCardInfoBar.Server.PreviouslyDenied,
	Autofill.CreditCardInfoBar.Server.PreviouslyAccepted}.

This caused confusion as it went against precedent where sub-histograms
shouldn't affect their parent's data, and as a result hid a lot of data
behind the .PreviouslyAccepted and .PreviouslyDenied subhistograms.

Here's what we want to happen instead, using
Autofill.CreditCardInfoBar.Server as an example:
1) Autofill.CreditCardInfoBar.Server goes back to containing ALL data,
not just a portion of it.
2) What used to go to Autofill.CreditCardInfoBar.Server should now go to
Autofill.CreditCardInfoBar.Server.NoPreviousDecision so that the
subhistograms are still useful.




Bug: 827414
Change-Id: I432e98f4729318e3e060e280551286b2bcfb80b0
Reviewed-on: https://chromium-review.googlesource.com/997026
Commit-Queue: Siyu An <siyua@chromium.org>
Reviewed-by: Evan Stade <estade@chromium.org>
Reviewed-by: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Reviewed-by: Jared Saul <jsaul@google.com>
Cr-Commit-Position: refs/heads/master@{#550100}