The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d5a83da5b2571eeb25b61f4b4bd6424b0695fb33

commit d5a83da5b2571eeb25b61f4b4bd6424b0695fb33
Author: sebsg <sebsg@chromium.org>
Date: Fri Mar 04 15:22:41 2016

[Autofill] Fix heuristics to detect cc-number on united.com.

The reason was that one of the cc-number fields has type="password", and we didn't support this type for cc-number fields.

BUG= 591166 

Review URL: https://codereview.chromium.org/1754793003

Cr-Commit-Position: refs/heads/master@{#379287}

[add] https://crrev.com/d5a83da5b2571eeb25b61f4b4bd6424b0695fb33/chrome/test/data/autofill/heuristics/input/138_cc_checkout_united.com.html
[add] https://crrev.com/d5a83da5b2571eeb25b61f4b4bd6424b0695fb33/chrome/test/data/autofill/heuristics/output/138_cc_checkout_united.com.out
[delete] https://crrev.com/b9fa69cad6684fcc4d045dae9ba097ae5ff77773/chrome/test/data/autofill/heuristics/output/27_checkout_cc_keurig.com.out
[modify] https://crrev.com/d5a83da5b2571eeb25b61f4b4bd6424b0695fb33/components/autofill/core/browser/credit_card_field.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/71634987bfffd49d609d37ae4a9747c17b6e291e

commit 71634987bfffd49d609d37ae4a9747c17b6e291e
Author: Justin Donnelly <jdonnelly@chromium.org>
Date: Mon Apr 04 17:32:09 2016

[Autofill] Fix heuristics to detect cc-number on united.com.

The reason was that one of the cc-number fields has type="password", and we didn't support this type for cc-number fields.

BUG= 591166 , 598873 

Review URL: https://codereview.chromium.org/1754793003

Cr-Commit-Position: refs/heads/master@{#379287}
(cherry picked from commit d5a83da5b2571eeb25b61f4b4bd6424b0695fb33)

Review URL: https://codereview.chromium.org/1859633002 .

Cr-Commit-Position: refs/branch-heads/2661@{#476}
Cr-Branched-From: ef6f6ae5e4c96622286b563658d5cd62a6cf1197-refs/heads/master@{#378081}

[add] https://crrev.com/71634987bfffd49d609d37ae4a9747c17b6e291e/chrome/test/data/autofill/heuristics/input/138_cc_checkout_united.com.html
[add] https://crrev.com/71634987bfffd49d609d37ae4a9747c17b6e291e/chrome/test/data/autofill/heuristics/output/138_cc_checkout_united.com.out
[modify] https://crrev.com/71634987bfffd49d609d37ae4a9747c17b6e291e/components/autofill/core/browser/credit_card_field.cc