[Autofill] UKM for suggestions polled field.

tools/metrics/ukm/ukm.xml

Index: tools/metrics/ukm/ukm.xml
diff --git a/tools/metrics/ukm/ukm.xml b/tools/metrics/ukm/ukm.xml
index ab75b3a1ed0b53dd279b96f8a32f41e1e48e44a4..c3640cba97a745453df65dc6f7af10d48bc8112d 100644
--- a/tools/metrics/ukm/ukm.xml
+++ b/tools/metrics/ukm/ukm.xml
@@ -76,7 +76,7 @@ be describing additional metrics about the same event.
   </metric>
 </event>
 
-<event name="Autofill.SuggestionsShown">
+<event name="Autofill.SelectedMaskedServerCard">
   <owner>csashi@google.com</owner>
   <metric name="MillisecondsSinceFormParsed">
     <summary>
@@ -85,30 +85,50 @@ be describing additional metrics about the same event.
   </metric>
 </event>
 
-<event name="Autofill.SelectedMaskedServerCard">
+<event name="Autofill.SuggestionFilled">
   <owner>csashi@google.com</owner>
+  <summary>
+    Recorded when user selects a suggestion and we fill the form with that
+    suggestion.
+  </summary>
   <metric name="MillisecondsSinceFormParsed">
     <summary>
       Time since form parse.
     </summary>
   </metric>
+  <metric name="RecordType">
+    <summary>
+      Whether the suggestion was from a local card/autofill profile or from a
+      server card/autofill profile.
+    </summary>
+  </metric>
 </event>
 
-<event name="Autofill.SuggestionFilled">
+<event name="Autofill.SuggestionsShown">
   <owner>csashi@google.com</owner>
   <summary>
-    Recorded when user selects a suggestion and we fill the form with that
-    suggestion.
+    Recorded when a suggestion is shown to user.
   </summary>
+  <metric name="HeuristicType">
+    <summary>
+      Field's |ServerFieldType| based on heuristics. See
+      |AutofillField.heuristic_type()|.
+    </summary>
+  </metric>
+  <metric name="HtmlFieldType">
+    <summary>
+      Field's autocomplete field type hint. See |AutofillField.html_type()|.
+    </summary>
+  </metric>
   <metric name="MillisecondsSinceFormParsed">
     <summary>
       Time since form parse.
     </summary>
   </metric>
-  <metric name="RecordType">
+  <metric name="ServerType">
     <summary>
-      Whether the suggestion was from a local card/autofill profile or from a
-      server card/autofill profile.
+      Field's |ServerFieldType| returned by server. See
+      |AutofillField.server_type()|.
     </summary>
   </metric>
 </event>