[Merge M53] [Autofill] Improve support for various credit card expiration dates.

[Merge M53] [Autofill] Improve support for various credit card expiration dates.

Supports 2-digit years, and various combinations of mm/yyyy and single digit month combinations (e.g. m/yy).

BUG=626537
TEST=CreditCardTest,PersonalDataManagerTest

Review-Url: https://codereview.chromium.org/2136453003
Cr-Commit-Position: refs/heads/master@{#404467}
(cherry picked from commit 303f4384d13900b31a5b854843b2a18d36176639)

Committed: https://chromium.googlesource.com/chromium/src/+/915707859844eade749a2f732f9f3382adcf2918

[Mathieu, 2016-07-09 19:05:10]

Description was changed from

==========
[Merge M53] [Autofill] Improve support for various credit card expiration dates.

Supports 2-digit years, and various combinations of mm/yyyy and single digit
month combinations (e.g. m/yy).

BUG=626537
TEST=CreditCardTest,PersonalDataManagerTest

Review-Url: https://codereview.chromium.org/2136453003
Cr-Commit-Position: refs/heads/master@{#404467}
(cherry picked from commit 303f4384d13900b31a5b854843b2a18d36176639)
==========

to

==========
[Merge M53] [Autofill] Improve support for various credit card expiration dates.

Supports 2-digit years, and various combinations of mm/yyyy and single digit
month combinations (e.g. m/yy).

BUG=626537
TEST=CreditCardTest,PersonalDataManagerTest

Review-Url: https://codereview.chromium.org/2136453003
Cr-Commit-Position: refs/heads/master@{#404467}
(cherry picked from commit 303f4384d13900b31a5b854843b2a18d36176639)

Committed:
https://chromium.googlesource.com/chromium/src/+/915707859844eade749a2f732f9f...
==========

[Mathieu, 2016-07-09 19:05:12]

Committed patchset #1 (id:1) manually as
915707859844eade749a2f732f9f3382adcf2918.