[Autofill] Log the number of autofill profiles available at form submission

components/autofill/core/browser/autofill_manager.cc

 // 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.
 
 #include "components/autofill/core/browser/autofill_manager.h"
 
 #include <stddef.h>
 
 #include <limits>
 #include <map>
@@ skipping 321 matching lines @@
   // Don't save data that was submitted through JavaScript.
   if (!form.user_submitted)
     return false;
 
   // Ignore forms not present in our cache.  These are typically forms with
   // wonky JavaScript that also makes them not auto-fillable.
   FormStructure* cached_submitted_form;
   if (!FindCachedForm(form, &cached_submitted_form))
     return false;
 
+  const std::vector<AutofillProfile*>& profiles = personal_data_->GetProfiles();
+  const std::vector<CreditCard*>& credit_cards =
+      personal_data_->GetCreditCards();
+
   submitted_form->UpdateFromCache(*cached_submitted_form);
-  if (submitted_form->IsAutofillable())
+  if (submitted_form->IsAutofillable()) {
     ImportFormData(*submitted_form);
 
+    AutofillMetrics::LogNumberOfProfilesAtFormSubmission(profiles.size());
+  }
+
   // Only upload server statistics and UMA metrics if at least some local data
   // is available to use as a baseline.
-  const std::vector<AutofillProfile*>& profiles = personal_data_->GetProfiles();
-  const std::vector<CreditCard*>& credit_cards =
-      personal_data_->GetCreditCards();
   if (!profiles.empty() || !credit_cards.empty()) {
     // Copy the profile and credit card data, so that it can be accessed on a
     // separate thread.
     std::vector<AutofillProfile> copied_profiles;
     copied_profiles.reserve(profiles.size());
     for (std::vector<AutofillProfile*>::const_iterator it = profiles.begin();
          it != profiles.end(); ++it) {
       copied_profiles.push_back(**it);
     }
 
@@ skipping 139 matching lines @@
         }
 
         // When filling credit card suggestions, the values and labels are
         // typically obfuscated, which makes detecting duplicates hard.  Since
         // duplicates only tend to be a problem when filling address forms
         // anyway, only don't de-dup credit card suggestions.
         if (!is_filling_credit_card)
           RemoveDuplicateSuggestions(&suggestions);
 
         // The first time we show suggestions on this page, log the number of
-        // suggestions shown.
+        // suggestions available.
+        // TODO(mathp): Differentiate between number of suggestions available
+        // (current metric) and number shown to the user.
         if (!has_logged_address_suggestions_count_ && !section_is_autofilled) {
           AutofillMetrics::LogAddressSuggestionsCount(suggestions.size());
           has_logged_address_suggestions_count_ = true;
         }
       }
     }
   }
 
   if (field.should_autocomplete) {
     // Add the results from AutoComplete.  They come back asynchronously, so we
@@ skipping 829 matching lines @@
     return false;
 
   // Disregard forms that we wouldn't ever autofill in the first place.
   if (!form.ShouldBeParsed())
     return false;
 
   return true;
 }
 
 }  // namespace autofill