Move counters for passwords, history and autofill to components

components/browsing_data/core/counters/browsing_data_counter.h

 // Copyright 2015 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_BROWSING_DATA_CORE_COUNTERS_BROWSING_DATA_COUNTER_H_
 #define COMPONENTS_BROWSING_DATA_CORE_COUNTERS_BROWSING_DATA_COUNTER_H_
 
 #include <stdint.h>
 #include <string>
 
@@ skipping 40 matching lines @@
     ResultInt Value() const;
 
    private:
     ResultInt value_;
 
     DISALLOW_COPY_AND_ASSIGN(FinishedResult);
   };
 
   typedef base::Callback<void(std::unique_ptr<Result>)> Callback;
 
-  BrowsingDataCounter(const std::string& pref_name);
+  BrowsingDataCounter();
   virtual ~BrowsingDataCounter();
 
   // Should be called once to initialize this class.
   void Init(PrefService* pref_service, const Callback& callback);
 
   // Name of the preference associated with this counter.
-  const std::string& GetPrefName() const;
+  virtual const char* GetPrefName() const = 0;
 
   // PrefService that manages the preferences for the user profile
   // associated with this counter.
   PrefService* GetPrefs() const;
 
   // Restarts the counter. Will be called automatically if the counting needs
   // to be restarted, e.g. when the deletion preference changes state or when
   // we are notified of data changes.
   void Restart();
 
  protected:
   // Should be called from |Count| by any overriding class to indicate that
   // counting is finished and report |value| as the result.
   void ReportResult(ResultInt value);
 
   // A convenience overload of the previous method that allows subclasses to
   // provide a custom |result|.
   void ReportResult(std::unique_ptr<Result> result);
 
   // Calculates the beginning of the counting period as |period_| before now.
   base::Time GetPeriodStart();
 
  private:
   // Called after the class is initialized by calling |Init|.
   virtual void OnInitialized();
 
   // Count the data.
   virtual void Count() = 0;
 
-  // Name of the preference associated with this counter.
-  const std::string pref_name_;
-
   // Pointer to the PrefService that manages the preferences for the user
   // profile associated with this counter.
   PrefService* pref_service_;
 
   // The callback that will be called when the UI should be updated with a new
   // counter value.
   Callback callback_;
 
   // The boolean preference indicating whether this data type is to be deleted.
   // If false, we will not count it.
   BooleanPrefMember pref_;
 
   // The integer preference describing the time period for which this data type
   // is to be deleted.
   IntegerPrefMember period_;
 
   // Whether this class was properly initialized by calling |Init|.
   bool initialized_ = false;
 };
 
 }  // namespace browsing_data
 
 #endif  // COMPONENTS_BROWSING_DATA_CORE_COUNTERS_BROWSING_DATA_COUNTER_H_