commit 23c6e824ff2ce54ca4a1c79a2e61163cb928dc6a
author rouslan <rouslan@chromium.org> Wed Apr 20 00:04:19 2016
committer Commit bot <commit-bot@chromium.org> Wed Apr 20 00:06:20 2016
tree 5d4f0f464fafc849317e77055abee0ced7154013
parent e8340bc90789f2084eb1cb128b87679170a5d59d

Customize card unmasking prompt

This patch enables switching the card unmasking prompt between two
configurations:

UNMASK_FOR_AUTOFILL:
 - Title: "Verify your card"
 - Instructions: "Enter the 3-digit CVC number from the back of your
                  card."
 - Confirm button: "Verify"

The UNMASK_FOR_AUTOFILL mode is how the unmasking prompt looks today.

UNMASK_FOR_PAYMENT_REQUEST:
 - Title: "Pay with your card"
 - Instructions: "Enter the 3-digit CVC number from the back of your
                  card for verification."
 - Confirm button: "Continue"

The UNMASK_FOR_PAYMENT_REQUEST mode is needed to support paying with
masked server cards in PaymentRequest.

BUG=587995

Review URL: https://codereview.chromium.org/1895143003

Cr-Commit-Position: refs/heads/master@{#388368}