[Payments] Add information requested by merchant metrics to PR.

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 c6ba576435227b9823cd0e9ee2ac6cd736c9e7b5..45bca8d15f9ae2395713ee556320b90feb2d0190 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -38989,6 +38989,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="PaymentRequest.RequestedInformation"
+    enum="PaymentRequestRequestedInformation">
+  <owner>sebsg@chromium.org</owner>
+  <summary>
+    Tracks what user information is required by merchants to complete a Payment
+    Request.
+  </summary>
+</histogram>
+
 <histogram name="PDF.DocumentFeature" enum="PDFFeatures">
   <owner>tsergeant@chromium.org</owner>
   <summary>
@@ -86571,6 +86580,17 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="3" label="Server failed"/>
 </enum>
 
+<enum name="PaymentRequestRequestedInformation" type="int">
+  <int value="0" label="None"/>
+  <int value="1" label="Email"/>
+  <int value="2" label="Phone"/>
+  <int value="3" label="Shipping Address"/>
+  <int value="4" label="Email and Phone"/>
+  <int value="5" label="Email and Shipping Address"/>
+  <int value="6" label="Phone and Shipping Address"/>
+  <int value="7" label="Email, Phone and Shipping Address"/>
+</enum>
+
 <enum name="PDFFeatures" type="int">
   <int value="0" label="Loaded Document"/>
   <int value="1" label="Has Title"/>