Replace profile statistics preference count with AutofillCounter

chrome/browser/profiles/profile_statistics_aggregator.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_AGGREGATOR_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_STATISTICS_AGGREGATOR_H_
 
-#include <stddef.h>
-
 #include <memory>
-#include <set>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/files/file_path.h"
-#include "base/memory/ref_counted.h"
-#include "base/task/cancelable_task_tracker.h"
-#include "base/task_runner.h"
 #include "chrome/browser/profiles/profile_statistics_common.h"
 #include "components/browsing_data/core/counters/browsing_data_counter.h"
 
 class Profile;
 
-class ProfileStatisticsAggregator
-    : public base::RefCountedThreadSafe<ProfileStatisticsAggregator> {
-  // This class is used internally by GetProfileStatistics and
-  // StoreProfileStatisticsToCache.
+class ProfileStatisticsAggregator {
+  // This class is used internally by ProfileStatistics
   //
   // The class collects statistical information about the profile and returns
   // the information via a callback function. Currently bookmarks, history,
-  // logins and preferences are counted.
-  //
-  // The class is RefCounted because this is needed for CancelableTaskTracker
-  // to function properly.
+  // logins and sites with autofill forms are counted.
 
  public:
   ProfileStatisticsAggregator(Profile* profile,
                               const base::Closure& done_callback);
 
+  ~ProfileStatisticsAggregator();
+
   void AddCallbackAndStartAggregator(
       const profiles::ProfileStatisticsCallback& stats_callback);
 
-  // The method below is used for testing.
-  size_t GetCallbackCount();
-
  private:
-  friend class base::RefCountedThreadSafe<ProfileStatisticsAggregator>;
-
-  struct ProfileStatValue {
-    int count = 0;
-    bool success = false;  // False means the statistics failed to load.
-  };
-
-  ~ProfileStatisticsAggregator();
-
   // Start gathering statistics. Also cancels existing statistics tasks.
   void StartAggregator();
 
   // Callback functions
-  // Normal callback. Appends result to |profile_category_stats_|, and then call
-  // the external callback. All other callbacks call this function.
-  void StatisticsCallback(const char* category, ProfileStatValue result);
-  // Callback for reporting success.
-  void StatisticsCallbackSuccess(const char* category, int count);
-  // Callback for reporting failure.
-  void StatisticsCallbackFailure(const char* category);
+  // Appends result to |profile_category_stats_|, and then calls
+  // the external callback.
+  void StatisticsCallback(const char* category, int count);
 
   // Callback for counters.
   void OnCounterResult(
       std::unique_ptr<browsing_data::BrowsingDataCounter::Result> result);
 
   // Registers, initializes and starts a BrowsingDataCounter.
   void AddCounter(std::unique_ptr<browsing_data::BrowsingDataCounter> counter);
 
-  // Preference counting.
-  ProfileStatValue CountPrefs() const;
-
   Profile* profile_;
   base::FilePath profile_path_;
   profiles::ProfileCategoryStats profile_category_stats_;
 
   // Callback function to be called when results arrive. Will be called
   // multiple times (once for each statistics).
   std::vector<profiles::ProfileStatisticsCallback> stats_callbacks_;
 
   // Callback function to be called when all statistics are calculated.
   base::Closure done_callback_;
 
-  base::CancelableTaskTracker tracker_;
-
   std::vector<std::unique_ptr<browsing_data::BrowsingDataCounter>> counters_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileStatisticsAggregator);
 };
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_STATISTICS_AGGREGATOR_H_