Add metrics to measure time elapsed between form load and form submission with or without Autofill.

chrome/browser/autofill/autofill_metrics.h

 // Copyright (c) 2011 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 CHROME_BROWSER_AUTOFILL_AUTOFILL_METRICS_H_
 #define CHROME_BROWSER_AUTOFILL_AUTOFILL_METRICS_H_
 #pragma once
 
 #include <stddef.h>
 #include <string>
 
 #include "base/basictypes.h"
 #include "chrome/browser/autofill/field_types.h"
 
+namespace base {
+class TimeDelta;
+}
+
 class AutofillMetrics {
  public:
   enum InfoBarMetric {
     INFOBAR_SHOWN = 0,  // We showed an infobar, e.g. prompting to save credit
                         // card info.
     INFOBAR_ACCEPTED,   // The user explicitly accepted the infobar.
     INFOBAR_DENIED,     // The user explicitly denied the infobar.
     INFOBAR_IGNORED,    // The user completely ignored the infobar (logged on
                         // tab close).
     NUM_INFO_BAR_METRICS
@@ skipping 84 matching lines @@
     USER_DID_AUTOFILL,
     // Same as above, but only logged once per page load.
     USER_DID_AUTOFILL_ONCE,
     // User edited a previously autofilled field.
     USER_DID_EDIT_AUTOFILLED_FIELD,
     // Same as above, but only logged once per page load.
     USER_DID_EDIT_AUTOFILLED_FIELD_ONCE,
     NUM_USER_HAPPINESS_METRICS
   };
 
-  // TODO(isherman): Add histograms to measure time elapsed between form load
-  // form submission, comparing autofilled and non-autofilled forms.  So that we
-  // are measuring apples to apples, restrict just to fillable forms.
-
   AutofillMetrics();
   virtual ~AutofillMetrics();
 
   virtual void LogCreditCardInfoBarMetric(InfoBarMetric metric) const;
 
   virtual void LogHeuristicTypePrediction(
       FieldTypeQualityMetric metric,
       AutofillFieldType field_type,
       const std::string& experiment_id) const;
   virtual void LogOverallTypePrediction(
       FieldTypeQualityMetric metric,
       AutofillFieldType field_type,
       const std::string& experiment_id) const;
   virtual void LogServerTypePrediction(FieldTypeQualityMetric metric,
                                        AutofillFieldType field_type,
                                        const std::string& experiment_id) const;
 
   virtual void LogQualityMetric(QualityMetric metric,
                                 const std::string& experiment_id) const;
 
   virtual void LogServerQueryMetric(ServerQueryMetric metric) const;
 
   virtual void LogUserHappinessMetric(UserHappinessMetric metric) const;
 
+  // This should be called when a form that has been Autofilled is submitted.
+  // |duration| should be the time elapsed between form load and submission.
+  virtual void LogFormFillDurationFromLoadWithAutofill(
+      const base::TimeDelta& duration) const;
+
+  // This should be called when a fillable form that has not been Autofilled is
+  // submitted.  |duration| should be the time elapsed between form load and
+  // submission.
+  virtual void LogFormFillDurationFromLoadWithoutAutofill(
+      const base::TimeDelta& duration) const;
+
+  // This should be called when a form that has been Autofilled is submitted.
+  // |duration| should be the time elapsed between the initial form interaction
+  // and submission.
+  virtual void LogFormFillDurationFromInteractionWithAutofill(
+      const base::TimeDelta& duration) const;
+
+  // This should be called when a fillable form that has not been Autofilled is
+  // submitted.  |duration| should be the time elapsed between the initial form
+  // interaction and submission.
+  virtual void LogFormFillDurationFromInteractionWithoutAutofill(
+      const base::TimeDelta& duration) const;
 
   // This should be called each time a page containing forms is loaded.
   virtual void LogIsAutofillEnabledAtPageLoad(bool enabled) const;
 
   // This should be called each time a new profile is launched.
   virtual void LogIsAutofillEnabledAtStartup(bool enabled) const;
 
   // This should be called each time a new profile is launched.
   virtual void LogStoredProfileCount(size_t num_profiles) const;
 
   // Log the number of Autofill suggestions presented to the user when filling a
   // form.
   virtual void LogAddressSuggestionsCount(size_t num_suggestions) const;
 
   // Logs the experiment id corresponding to a server query response.
   virtual void LogServerExperimentIdForQuery(
       const std::string& experiment_id) const;
 
   // Logs the experiment id corresponding to an upload to the server.
   virtual void LogServerExperimentIdForUpload(
       const std::string& experiment_id) const;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AutofillMetrics);
 };
 
 #endif  // CHROME_BROWSER_AUTOFILL_AUTOFILL_METRICS_H_