[Offline Pages] Add cached offline page utils and show usage in settings.

chrome/browser/ui/webui/options/chromeos/storage_manager_handler.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_UI_WEBUI_OPTIONS_CHROMEOS_STORAGE_MANAGER_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_STORAGE_MANAGER_HANDLER_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 52 matching lines @@
   // Requests updating the size of Drive Cache.
   void UpdateDriveCacheSize();
 
   // Callback to update the UI about the size of Drive Cache.
   void OnGetDriveCacheSize(int64_t size);
 
   // Requests updating the size of browsing data.
   void UpdateBrowsingDataSize();
 
   // Callback to receive the cache size.
-  void OnGetCacheSize(int64_t size, bool is_upper_limit);
+  void OnGetCacheSize(bool is_upper_limit, int64_t size);
 
   // Callback to update the UI about the size of browsing data.
   void OnGetBrowsingDataSize(bool is_site_data, int64_t size);
 
   // Requests updating the total size of other users' data.
   void UpdateOtherUsersSize();
 
   // Callback to save the fetched user sizes and update the UI.
   void OnGetOtherUserSize(bool success, int64_t size);
 
@@ skipping 37 matching lines @@
 
   base::WeakPtrFactory<StorageManagerHandler> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(StorageManagerHandler);
 };
 
 }  // namespace options
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_STORAGE_MANAGER_HANDLER_H_