Add a counter to calculate the total size of site data.

chrome/browser/browsing_data/mock_browsing_data_file_system_helper.h

 // Copyright (c) 2012 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_MOCK_BROWSING_DATA_FILE_SYSTEM_HELPER_H_
 #define CHROME_BROWSER_BROWSING_DATA_MOCK_BROWSING_DATA_FILE_SYSTEM_HELPER_H_
 
 #include <list>
 #include <map>
 #include <string>
@@ skipping 10 matching lines @@
   explicit MockBrowsingDataFileSystemHelper(Profile* profile);
 
   // BrowsingDataFileSystemHelper implementation.
   void StartFetching(const FetchCallback& callback) override;
   void DeleteFileSystemOrigin(const GURL& origin) override;
 
   // Adds a specific filesystem.
   void AddFileSystem(const GURL& origin,
                      bool has_persistent,
                      bool has_temporary,
-                     bool has_syncable);
+                     bool has_syncable,
+                     int64_t size_persistent,
+                     int64_t size_temporary,
+                     int64_t size_syncable);
 
   // Adds some FilesystemInfo samples.
   void AddFileSystemSamples();
 
   // Notifies the callback.
   void Notify();
 
   // Marks all filesystems as existing.
   void Reset();
 
@@ skipping 10 matching lines @@
 
   // Stores which filesystems exist.
   std::map<const std::string, bool> file_systems_;
 
   std::list<FileSystemInfo> response_;
 
   DISALLOW_COPY_AND_ASSIGN(MockBrowsingDataFileSystemHelper);
 };
 
 #endif  // CHROME_BROWSER_BROWSING_DATA_MOCK_BROWSING_DATA_FILE_SYSTEM_HELPER_H_