[Payments] Fix the histogram_suffixes for the JourneyLogger.

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 31dc08efb3e571a645458f034bd7751ea9a40134..8f5a4d21ca6699e04f3c8f3e211bfc44ea732db7 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -112784,35 +112784,35 @@ value.
   <affected-histogram name="PasswordManager.TotalAccountsHiRes.WithScheme"/>
 </histogram_suffixes>
 
-<histogram_suffixes name="PaymentRequestOutcome">
+<histogram_suffixes name="PaymentRequestOutcome" separator=".">
   <suffix name="Completed" label="The Payment Request was completed"/>
   <suffix name="UserAborted"
       label="The Payment Request was aborted by the user"/>
   <suffix name="OtherAborted"
       label="The Payment Request was aborted but not but the user"/>
-  <affected-histogram name="PaymentRequest.NumberOfSelectionAdds_ContactInfo"/>
-  <affected-histogram name="PaymentRequest.NumberOfSelectionAdds_CreditCards"/>
+  <affected-histogram name="PaymentRequest.NumberOfSelectionAdds.ContactInfo"/>
+  <affected-histogram name="PaymentRequest.NumberOfSelectionAdds.CreditCards"/>
   <affected-histogram
-      name="PaymentRequest.NumberOfSelectionAdds_ShippingAddress"/>
+      name="PaymentRequest.NumberOfSelectionAdds.ShippingAddress"/>
   <affected-histogram
-      name="PaymentRequest.NumberOfSelectionChanges_ContactInfo"/>
+      name="PaymentRequest.NumberOfSelectionChanges.ContactInfo"/>
   <affected-histogram
-      name="PaymentRequest.NumberOfSelectionChanges_CreditCards"/>
+      name="PaymentRequest.NumberOfSelectionChanges.CreditCards"/>
   <affected-histogram
-      name="PaymentRequest.NumberOfSelectionChanges_ShippingAddress"/>
-  <affected-histogram name="PaymentRequest.NumberOfSelectionEdits_ContactInfo"/>
-  <affected-histogram name="PaymentRequest.NumberOfSelectionEdits_CreditCards"/>
+      name="PaymentRequest.NumberOfSelectionChanges.ShippingAddress"/>
+  <affected-histogram name="PaymentRequest.NumberOfSelectionEdits.ContactInfo"/>
+  <affected-histogram name="PaymentRequest.NumberOfSelectionEdits.CreditCards"/>
   <affected-histogram
-      name="PaymentRequest.NumberOfSelectionEdits_ShippingAddress"/>
+      name="PaymentRequest.NumberOfSelectionEdits.ShippingAddress"/>
   <affected-histogram
-      name="PaymentRequest.NumberOfSuggestionsShown_ContactInfo"/>
+      name="PaymentRequest.NumberOfSuggestionsShown.ContactInfo"/>
   <affected-histogram
-      name="PaymentRequest.NumberOfSuggestionsShown_CreditCards"/>
+      name="PaymentRequest.NumberOfSuggestionsShown.CreditCards"/>
   <affected-histogram
-      name="PaymentRequest.NumberOfSuggestionsShown_ShippingAddress"/>
+      name="PaymentRequest.NumberOfSuggestionsShown.ShippingAddress"/>
 </histogram_suffixes>
 
-<histogram_suffixes name="PaymentRequestSection">
+<histogram_suffixes name="PaymentRequestSection" separator=".">
   <suffix name="ContactInfo"
       label="For the contact info section of a Payment Request"/>
   <suffix name="CreditCards"