Adds UKM for autofill attributes in form_structure.

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 base
 
 namespace ukm {
 class UkmService;
 }  // namespace ukm
 
 namespace internal {
 // Name constants are exposed here so they can be referenced from tests.
 extern const char kUKMCardUploadDecisionEntryName[];
 extern const char kUKMCardUploadDecisionMetricName[];
+extern const char kUKMDeveloperEngagementEntryName[];
+extern const char kUKMDeveloperEngagementMetricName[];
 }  // namespace internal
 
 namespace autofill {
 
 class AutofillMetrics {
  public:
   enum AutofillProfileAction {
     EXISTING_PROFILE_USED,
     EXISTING_PROFILE_UPDATED,
     NEW_PROFILE_CREATED,
@@ skipping 650 matching lines @@
   // suggestion to show an explanation of the warning.
   static void LogShowedHttpNotSecureExplanation();
 
   // Logs the card upload decision ukm based on the specified |url| and
   // |upload_decision|.
   static void LogCardUploadDecisionUkm(
       ukm::UkmService* ukm_service,
       const GURL& url,
       AutofillMetrics::CardUploadDecisionMetric upload_decision);
 
+  // Logs the developer engagement ukm for the specified |url| and autofill
+  // fields in the form structure.
+  static void LogDeveloperEngagementUkm(
+      ukm::UkmService* ukm_service,
+      const GURL& url,
+      AutofillMetrics::DeveloperEngagementMetric form_structure_metric);
+
   // Logs the the |ukm_entry_name| with the specified |url| and the specified
   // |metrics|. Returns whether the ukm was sucessfully logged.
   static bool LogUkm(ukm::UkmService* ukm_service,
                      const GURL& url,
                      const std::string& ukm_entry_name,
                      const std::map<std::string, int>& metrics);
 
   // Utility to autofill form events in the relevant histograms depending on
   // the presence of server and/or local data.
   class FormEventLogger {
@@ skipping 50 matching lines @@
     FormFieldData last_polled_field_;
   };
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(AutofillMetrics);
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_METRICS_H_