Replace profile statistics preference count with AutofillCounter

chrome/browser/profiles/profile_statistics_common.h

 // Copyright 2016 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_PROFILES_PROFILE_STATISTICS_COMMON_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_STATISTICS_COMMON_H_
 
 #include <array>
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
 
 namespace profiles {
 // Constants for the categories in ProfileCategoryStats.
 extern const char kProfileStatisticsBrowsingHistory[];
 extern const char kProfileStatisticsPasswords[];
 extern const char kProfileStatisticsBookmarks[];
-extern const char kProfileStatisticsSettings[];
+extern const char kProfileStatisticsAutofill[];
 
 extern const std::array<const char*, 4> kProfileStatisticsCategories;
 
-// Definition of a single return value of |ProfileStatisticsCallback|. If
-// |success| is false, the statistics failed to load and |count| is undefined.
-// The data look like these: {"BrowsingHistory", 912, true},
-// {"Passwords", 71, true}, {"Bookmarks", 120, true}, {"Settings", 200, true}
+// Definition of a single return value of |ProfileStatisticsCallback|.
+// The data look like these: {"BrowsingHistory", 912},
+// {"Passwords", 71}, {"Bookmarks", 120}, {"Autofill", 200}.
 struct ProfileCategoryStat {
   std::string category;
   int count;
-  bool success;
 };
 
 // Definition of the return value of |ProfileStatisticsCallback|.
 using ProfileCategoryStats = std::vector<ProfileCategoryStat>;
 
 // Definition of the callback function. Note that a copy of
 // |ProfileCategoryStats| is made each time the callback is called.
 using ProfileStatisticsCallback = base::Callback<void(ProfileCategoryStats)>;
 }  // namespace profiles
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_STATISTICS_COMMON_H_