Move IndexedDB from WEBKIT_DEPRECATED to dedicated thread

chrome/browser/browsing_data/browsing_data_indexed_db_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_BROWSING_DATA_INDEXED_DB_HELPER_H_
 #define CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_INDEXED_DB_HELPER_H_
 
 #include <list>
 #include <set>
 #include <string>
@@ skipping 21 matching lines @@
   // stored in |profile|'s user data directory.
   static BrowsingDataIndexedDBHelper* Create(
       content::IndexedDBContext* context);
 
   // Starts the fetching process, which will notify its completion via
   // callback.
   // This must be called only in the UI thread.
   virtual void StartFetching(
       const base::Callback<void(const std::list<content::IndexedDBInfo>&)>&
           callback) = 0;
-  // Requests a single indexed database to be deleted in the WEBKIT thread.
+  // Requests a single indexed database to be deleted in the IndexedDB thread.
   virtual void DeleteIndexedDB(const GURL& origin) = 0;
 
  protected:
   friend class base::RefCountedThreadSafe<BrowsingDataIndexedDBHelper>;
   virtual ~BrowsingDataIndexedDBHelper() {}
 };
 
 // This class is an implementation of BrowsingDataIndexedDBHelper that does
 // not fetch its information from the indexed database tracker, but gets them
 // passed as a parameter.
@@ skipping 40 matching lines @@
   virtual void StartFetching(
       const base::Callback<void(const std::list<content::IndexedDBInfo>&)>&
           callback) OVERRIDE;
 
   virtual void DeleteIndexedDB(const GURL& origin) OVERRIDE {}
 
  private:
   virtual ~CannedBrowsingDataIndexedDBHelper();
 
   // Convert the pending indexed db info to indexed db info objects.
-  void ConvertPendingInfoInWebKitThread();
+  void ConvertPendingInfo();
 
-  void NotifyInUIThread();
-
-  // Lock to protect access to pending_indexed_db_info_;
-  mutable base::Lock lock_;
-
-  // Access to |pending_indexed_db_info_| is protected by |lock_| since it can
-  // be accessed on the UI and on the WEBKIT thread.
   std::set<PendingIndexedDBInfo> pending_indexed_db_info_;
 
   // Access to |indexed_db_info_| is triggered indirectly via the UI thread and
   // guarded by |is_fetching_|. This means |indexed_db_info_| is only accessed
   // while |is_fetching_| is true. The flag |is_fetching_| is only accessed on
   // the UI thread.
   // In the context of this class |indexed_db_info_| is only accessed on the UI
   // thread.
   std::list<content::IndexedDBInfo> indexed_db_info_;
 
   // This only mutates on the UI thread.
   base::Callback<void(const std::list<content::IndexedDBInfo>&)>
       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 notified the callback in the UI thread.
   // This only mutates on the UI thread.
   bool is_fetching_;
 
   DISALLOW_COPY_AND_ASSIGN(CannedBrowsingDataIndexedDBHelper);
 };
 
 #endif  // CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_INDEXED_DB_HELPER_H_