tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 8a6d4ca59891f9a3f4525f626c28184f4e581a36..474028be4325867628fcc44da06ca2d53ced2959 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -4118,6 +4118,23 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </details>
 </histogram>
 
+<histogram name="Autofill.FormEvents.CreditCard.BankNameDisplayed"
+    enum="BankNameDisplayedFormEvent">
+  <owner>szhangcs@google.com</owner>
+  <summary>
+    Autofill form events for measuring the impact of the bank name experiment.

[rkaplow1, 2017/06/19 18:00:01]

I wouldn't discuss how the metric will get used in the summary (you can put in
details). I would focus on the facts - you're not very clear in exactly what
this is measuring.

[Shanfeng, 2017/06/19 20:03:23]

Done. Hope it's clear now.

+    These are recorded when the user interacts with a form requesting a credit
+    card.
+  </summary>
+  <details>
+    These metrics are used to measure the CTR on autofill UI with bank names
+    available. Not all credit cards will have bank names even if we launch the
+    experiment. With these metrics we can run the experiment on 2 groups. For
+    one group, we will show bank names if available. For the other, we won't
+    shown.
+  </details>
+</histogram>
+
 <histogram name="Autofill.FormEvents.CreditCard.OnNonsecurePage"
     enum="AutofillFormEvent">
   <owner>estark@chromium.org</owner>