Refactor http cache removing from a StoragePartition into separate class:

chrome/browser/browsing_data/browsing_data_remover.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_BROWSING_DATA_REMOVER_H_
 #define CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_REMOVER_H_
 
 #include <set>
 
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/observer_list.h"
 #include "base/prefs/pref_member.h"
 #include "base/sequenced_task_runner_helpers.h"
 #include "base/synchronization/waitable_event_watcher.h"
 #include "base/task/cancelable_task_tracker.h"
 #include "base/time/time.h"
 #include "chrome/browser/pepper_flash_settings_manager.h"
 #include "components/search_engines/template_url_service.h"
 #if defined(OS_CHROMEOS)
 #include "chromeos/dbus/dbus_method_call_status.h"
 #endif
 #include "storage/common/quota/quota_types.h"
 #include "url/gurl.h"
 
-class ExtensionSpecialStoragePolicy;
 class IOThread;
 class Profile;
 
 namespace chrome_browser_net {
 class Predictor;
 }
 
 namespace content {
 class PluginDataRemover;
 class StoragePartition;
 }
 
-namespace disk_cache {
-class Backend;
-}
-
 namespace net {
 class URLRequestContextGetter;
 }
 
-namespace storage {
-class QuotaManager;
-}
-
-namespace content {
-class DOMStorageContext;
-struct LocalStorageUsageInfo;
-struct SessionStorageUsageInfo;
-}
-
 // BrowsingDataRemover is responsible for removing data related to browsing:
 // visits in url database, downloads, cookies ...
 
 class BrowsingDataRemover
 #if defined(ENABLE_PLUGINS)
     : public PepperFlashSettingsManager::Client
 #endif
     {
  public:
   // Time period ranges available when doing browsing data removals.
@@ skipping 163 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(ExtensionBrowsingDataTest, OneAtATime);
 
   // The BrowsingDataRemover tests need to be able to access the implementation
   // of Remove(), as it exposes details that aren't yet available in the public
   // API. As soon as those details are exposed via new methods, this should be
   // removed.
   //
   // TODO(mkwst): See http://crbug.com/113621
   friend class BrowsingDataRemoverTest;
 
-  enum CacheState {
-    STATE_NONE,
-    STATE_CREATE_MAIN,
-    STATE_CREATE_MEDIA,
-    STATE_DELETE_MAIN,
-    STATE_DELETE_MEDIA,
-    STATE_DONE
-  };
-
   // Setter for |is_removing_|; DCHECKs that we can only start removing if we're
   // not already removing, and vice-versa.
   static void set_removing(bool is_removing);
 
   // Creates a BrowsingDataRemover to remove browser data from the specified
   // profile in the specified time range. Use Remove to initiate the removal.
   BrowsingDataRemover(Profile* profile,
                       base::Time delete_begin,
                       base::Time delete_end);
 
@@ skipping 66 matching lines @@
   void ClearNetworkPredictorOnIOThread(
       chrome_browser_net::Predictor* predictor);
 
   // Callback for when network related data in ProfileIOData has been cleared.
   // Clears the respective waiting flag and invokes NotifyAndDeleteIfDone.
   void OnClearedNetworkingHistory();
 
   // Callback for when the cache has been deleted. Invokes
   // NotifyAndDeleteIfDone.
   void ClearedCache();
-
-  // Invoked on the IO thread to delete from the cache.
-  void ClearCacheOnIOThread();
-
-  // Performs the actual work to delete the cache.
-  void DoClearCache(int rv);
-
 #if !defined(DISABLE_NACL)
   // Callback for when the NaCl cache has been deleted. Invokes
   // NotifyAndDeleteIfDone.
   void ClearedNaClCache();
 
   // Invokes the ClearedNaClCache on the UI thread.
   void ClearedNaClCacheOnIOThread();
 
   // Invoked on the IO thread to delete the NaCl cache.
   void ClearNaClCacheOnIOThread();
@@ skipping 58 matching lines @@
   base::Time delete_end_;
 
   // True if Remove has been invoked.
   static bool is_removing_;
 
   // If non-NULL, the |completion_inhibitor_| is notified each time an instance
   // is about to complete a browsing data removal process, and has the ability
   // to artificially delay completion. Used for testing.
   static CompletionInhibitor* completion_inhibitor_;
 
-  CacheState next_cache_state_;
-  disk_cache::Backend* cache_;
-
   // Used to delete data from HTTP cache.
   scoped_refptr<net::URLRequestContextGetter> main_context_getter_;
   scoped_refptr<net::URLRequestContextGetter> media_context_getter_;
 
 #if defined(ENABLE_PLUGINS)
   // Used to delete plugin data.
   scoped_ptr<content::PluginDataRemover> plugin_data_remover_;
   base::WaitableEventWatcher watcher_;
 
   // Used to deauthorize content licenses for Pepper Flash.
@@ skipping 42 matching lines @@
 
   scoped_ptr<TemplateURLService::Subscription> template_url_sub_;
 
   // We do not own this.
   content::StoragePartition* storage_partition_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowsingDataRemover);
 };
 
 #endif  // CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_REMOVER_H_