Actually delete databases in CookiesTreeModel.

chrome/browser/browsing_data_database_helper.h

 // Copyright (c) 2010 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_DATABASE_HELPER_H_
 #define CHROME_BROWSER_BROWSING_DATA_DATABASE_HELPER_H_
 
 #include <string>
 #include <vector>
 
 #include "base/scoped_ptr.h"
 #include "base/task.h"
+#include "webkit/database/database_tracker.h"
 
 class Profile;
 
 // This class fetches database information in the FILE thread, and notifies the
 // UI thread upon completion.
 // A client of this class need to call StartFetching from the UI thread to
 // initiate the flow, and it'll be notified by the callback in its UI
 // thread at some later point.
 // The client must call CancelNotification() if it's destroyed before the
 // callback is notified.
@@ skipping 52 matching lines @@
   // Enumerates all databases. This must be called in the FILE thread.
   void FetchDatabaseInfoInFileThread();
 
   // Notifies the completion callback. This must be called in the UI thread.
   void NotifyInUIThread();
 
   // Delete a single database file. This must be called in the FILE thread.
   void DeleteDatabaseInFileThread(const std::string& origin,
                                   const std::string& name);
 
-  Profile* profile_;
+  scoped_refptr<webkit_database::DatabaseTracker> tracker_;
 
   // This only mutates on the UI thread.
   scoped_ptr<Callback1<const std::vector<DatabaseInfo>& >::Type >
       completion_callback_;
 
   // Indicates whether or not we're currently fetching information:
   // it's true when StartFetching() is called in the UI thread, and it's reset
   // after we notify the callback in the UI thread.
   // This only mutates on the UI thread.
   bool is_fetching_;
 
   // This only mutates in the FILE thread.
   std::vector<DatabaseInfo> database_info_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowsingDataDatabaseHelper);
 };
 
 #endif  // CHROME_BROWSER_BROWSING_DATA_DATABASE_HELPER_H_