Strawman proposal for chrome.experimental.clear.*

chrome/browser/browsing_data_remover.h

 // Copyright (c) 2011 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_REMOVER_H_
 #define CHROME_BROWSER_BROWSING_DATA_REMOVER_H_
 #pragma once
 
 #include <vector>
 
@@ skipping 80 matching lines @@
 
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
   // Called when history deletion is done.
   void OnHistoryDeletionDone();
 
   static bool is_removing() { return removing_; }
 
  private:
+  // The clear API needs to be able to toggle removing_ in order to test that
+  // only one BrowsingDataRemover instance can be called at a time.
+  FRIEND_TEST_ALL_PREFIXES(ExtensionApiTest, ClearOneAtATime);
+
   enum CacheState {
     STATE_NONE,
     STATE_CREATE_MAIN,
     STATE_CREATE_MEDIA,
     STATE_DELETE_MAIN,
     STATE_DELETE_MEDIA,
     STATE_DONE
   };
 
   // BrowsingDataRemover deletes itself (using DeleteTask) and is not supposed
@@ skipping 57 matching lines @@
 
   // Returns true if we're all done.
   bool all_done() {
     return registrar_.IsEmpty() && !waiting_for_clear_cache_ &&
            !waiting_for_clear_history_ &&
            !waiting_for_clear_quota_managed_data_ &&
            !waiting_for_clear_networking_history_ &&
            !waiting_for_clear_lso_data_;
   }
 
+  // Setter for removing_; DCHECKs that we can only start removing if we're not
+  // already removing, and vice-versa.
+  static void set_removing(bool removing);
+
   NotificationRegistrar registrar_;
 
   // Profile we're to remove from.
   Profile* profile_;
 
   // The QuotaManager is owned by the profile; we can use a raw pointer here,
   // and rely on the profile to destroy the object whenever it's reasonable.
   quota::QuotaManager* quota_manager_;
 
   // 'Protected' origins are not subject to data removal.
@@ skipping 35 matching lines @@
 
   ObserverList<Observer> observer_list_;
 
   // Used if we need to clear history.
   CancelableRequestConsumer request_consumer_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowsingDataRemover);
 };
 
 #endif  // CHROME_BROWSER_BROWSING_DATA_REMOVER_H_