[Autofill] Debounce suggestions poll user actions for the same field.

components/autofill/core/browser/autofill_metrics.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_METRICS_H_
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_METRICS_H_
 
 #include <stddef.h>
 #include <string>
 
 #include "base/macros.h"
 #include "components/autofill/core/browser/autofill_client.h"
 #include "components/autofill/core/browser/autofill_profile.h"
 #include "components/autofill/core/browser/credit_card.h"
 #include "components/autofill/core/browser/field_types.h"
+#include "components/autofill/core/common/form_field_data.h"
 
 namespace base {
 class TimeDelta;
 }
 
 namespace autofill {
 
 class AutofillMetrics {
  public:
   enum AutofillProfileAction {
@@ skipping 628 matching lines @@
     inline void set_is_server_data_available(bool is_server_data_available) {
       is_server_data_available_ = is_server_data_available;
     }
 
     inline void set_is_local_data_available(bool is_local_data_available) {
       is_local_data_available_ = is_local_data_available;
     }
 
     void OnDidInteractWithAutofillableForm();
 
-    void OnDidPollSuggestions();
+    void OnDidPollSuggestions(const FormFieldData& field);
 
     void OnDidShowSuggestions();
 
     void OnDidSelectMaskedServerCardSuggestion();
 
     // In case of masked cards, caller must make sure this gets called before
     // the card is upgraded to a full card.
     void OnDidFillSuggestion(const CreditCard& credit_card);
 
     void OnDidFillSuggestion(const AutofillProfile& profile);
 
     void OnWillSubmitForm();
 
     void OnFormSubmitted();
 
    private:
     void Log(FormEvent event) const;
 
     bool is_for_credit_card_;
     bool is_server_data_available_;
     bool is_local_data_available_;
     bool has_logged_interacted_;
     bool has_logged_suggestions_shown_;
     bool has_logged_masked_server_card_suggestion_selected_;
     bool has_logged_suggestion_filled_;
     bool has_logged_will_submit_;
     bool has_logged_submitted_;
     bool logged_suggestion_filled_was_server_data_;
     bool logged_suggestion_filled_was_masked_server_card_;
+
+    // The last field that was polled for suggestions.
+    FormFieldData last_polled_field_;
   };
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(AutofillMetrics);
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_METRICS_H_