The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/31af02951adbf93da81916bfd9746b8f55719cca

commit 31af02951adbf93da81916bfd9746b8f55719cca
Author: sebsg <sebsg@chromium.org>
Date: Thu Apr 13 22:22:27 2017

[Payments] Add metric for when Pr UI is skipped.

BUG= 710996 

Review-Url: https://codereview.chromium.org/2810323002
Cr-Commit-Position: refs/heads/master@{#464570}

[modify] https://crrev.com/31af02951adbf93da81916bfd9746b8f55719cca/chrome/android/java/src/org/chromium/chrome/browser/payments/JourneyLogger.java
[modify] https://crrev.com/31af02951adbf93da81916bfd9746b8f55719cca/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentRequestImpl.java
[modify] https://crrev.com/31af02951adbf93da81916bfd9746b8f55719cca/chrome/android/javatests/src/org/chromium/chrome/browser/payments/PaymentRequestMetricsTest.java
[modify] https://crrev.com/31af02951adbf93da81916bfd9746b8f55719cca/chrome/test/data/payments/metrics.js
[modify] https://crrev.com/31af02951adbf93da81916bfd9746b8f55719cca/chrome/test/data/payments/payment_request_metrics_test.html
[modify] https://crrev.com/31af02951adbf93da81916bfd9746b8f55719cca/components/payments/core/journey_logger.h
[modify] https://crrev.com/31af02951adbf93da81916bfd9746b8f55719cca/tools/metrics/histograms/histograms.xml