Move counters for passwords, history and autofill to components

chrome/browser/browsing_data/hosted_apps_counter.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_BROWSING_DATA_HOSTED_APPS_COUNTER_H_
 #define CHROME_BROWSER_BROWSING_DATA_HOSTED_APPS_COUNTER_H_
 
 #include <vector>
 
 #include "base/macros.h"
@@ skipping 16 matching lines @@
 
    private:
     const std::vector<std::string> examples_;
 
     DISALLOW_COPY_AND_ASSIGN(HostedAppsResult);
   };
 
   explicit HostedAppsCounter(Profile* profile);
   ~HostedAppsCounter() override;
 
+  const char* GetPrefName() const override;
+
  private:
   // BrowsingDataCounter:
   void Count() override;
 
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(HostedAppsCounter);
 };
 
 #endif  // CHROME_BROWSER_BROWSING_DATA_HOSTED_APPS_COUNTER_H_