[Autofill] UKM for suggestions polled field.

components/autofill/core/browser/autofill_metrics.h

Index: components/autofill/core/browser/autofill_metrics.h
diff --git a/components/autofill/core/browser/autofill_metrics.h b/components/autofill/core/browser/autofill_metrics.h
index 58ab8d26aa06d64471b9fe76613a5405d877f61c..1a24922b5157330b79386a0fceb932fad12dc023 100644
--- a/components/autofill/core/browser/autofill_metrics.h
+++ b/components/autofill/core/browser/autofill_metrics.h
@@ -38,6 +38,12 @@ extern const char kUKMIsForCreditCardMetricName[];
 extern const char kUKMLocalRecordTypeCountMetricName[];
 extern const char kUKMServerRecordTypeCountMetricName[];
 
+// |UkmEntry| when user polls suggestions. Metrics for field type.

[csashi, 2017/04/27 18:41:17]

Can we not add the metrics to "Suggestions shown" - poll suggestions seems like
an internal implementation detail that does not directly map to a comprehensible
action - or does it?

[jiahuiguo, 2017/05/24 18:00:00]

Done.

+extern const char kUKMPollSuggestionsEntryName[];
+extern const char kUKMHeuristicTypeMetricName[];
+extern const char kUKMHtmlFieldTypeMetricName[];
+extern const char kUKMServerTypeMetricName[];
+
 // |UkmEntry| when we show suggestions.
 extern const char kUKMSuggestionsShownEntryName[];
 
@@ -59,9 +65,6 @@ extern const char kUKMRecordTypeMetricName[];
 // |UkmEntry| for user editing text field. Metrics contain field's attributes.
 extern const char kUKMTextFieldDidChangeEntryName[];
 extern const char kUKMFieldTypeGroupMetricName[];
-extern const char kUKMHeuristicTypeMetricName[];
-extern const char kUKMServerTypeMetricName[];
-extern const char kUKMHtmlFieldTypeMetricName[];
 extern const char kUKMHtmlFieldModeMetricName[];
 extern const char kUKMIsAutofilledMetricName[];
 extern const char kUKMIsEmptyMetricName[];
@@ -622,6 +625,7 @@ class AutofillMetrics {
     void LogInteractedWithForm(bool is_for_credit_card,
                                size_t local_record_type_count,
                                size_t server_record_type_count);
+    void LogPollSuggestions(const AutofillField& field);
     void LogSuggestionsShown();
     void LogSelectedMaskedServerCard();
     void LogDidFillSuggestion(int record_type);
@@ -841,7 +845,8 @@ class AutofillMetrics {
 
     void OnDidInteractWithAutofillableForm();
 
-    void OnDidPollSuggestions(const FormFieldData& field);
+    void OnDidPollSuggestions(const FormFieldData& field,
+                              const AutofillField& autofill_field);
 
     void OnDidShowSuggestions();