Experiment to add bank name in autofill ui.

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 d849ce143f8bce195815706ee4ac48778b4ad44e..789da6da2085d70f355333dac92cdae9cf434344 100644
--- a/components/autofill/core/browser/autofill_metrics.h
+++ b/components/autofill/core/browser/autofill_metrics.h
@@ -542,10 +542,20 @@ class AutofillMetrics {
     // submitted. If the submission is not interrupted by JavaScript, the "form
     // submitted" event above will also be logged.
     FORM_EVENT_SUGGESTION_SHOWN_WILL_SUBMIT_ONCE,
-
     NUM_FORM_EVENTS,
   };
 
+  // Form Events for autofill bank name experiment.
+  enum BankNameExperimentFormEvent {

[Mathieu, 2017/06/16 18:27:05]

I wouldn't put Experiment in the enum name or description of the metric.

[Shanfeng, 2017/06/16 20:51:46]

Done.

+    // A dropdown with suggestions was shown and at least one suggestion has a
+    // bank name.
+    FORM_EVENT_SUGGESTIONS_SHOWN_WITH_BANK_NAME_AVAILABLE_ONCE = 0,
+    // A server suggestion was used to fill the form and at least one suggestion
+    // has a bank name
+    FORM_EVENT_SERVER_SUGGESTION_FILLED_WITH_BANK_NAME_AVAILABLE_ONCE,
+    BANK_NAME_NUM_FORM_EVENTS,
+  };
+
   // Events related to the Unmask Credit Card Prompt.
   enum UnmaskPromptEvent {
     // The prompt was shown.
@@ -937,8 +947,10 @@ class AutofillMetrics {
 
     void OnFormSubmitted();
 
+    void SetBankNameAvailable();
    private:
     void Log(FormEvent event) const;
+    void Log(BankNameExperimentFormEvent event) const;
 
     bool is_for_credit_card_;
     size_t server_record_type_count_;
@@ -950,6 +962,7 @@ class AutofillMetrics {
     bool has_logged_suggestion_filled_;
     bool has_logged_will_submit_;
     bool has_logged_submitted_;
+    bool has_logged_bank_name_available_;
     bool logged_suggestion_filled_was_server_data_;
     bool logged_suggestion_filled_was_masked_server_card_;