IndexedDB: Sprinkle DISALLOW_COPY_AND_ASSIGN where appropriate

content/browser/indexed_db/indexed_db_transaction.h

 // Copyright (c) 2013 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 CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_TRANSACTION_H_
 #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_TRANSACTION_H_
 
 #include <queue>
 #include <set>
 #include <stack>
@@ skipping 114 matching lines @@
    public:
     TaskQueue();
     ~TaskQueue();
     bool empty() const { return queue_.empty(); }
     void push(Operation task) { queue_.push(task); }
     Operation pop();
     void clear();
 
    private:
     std::queue<Operation> queue_;
+
+    DISALLOW_COPY_AND_ASSIGN(TaskQueue);
   };
 
   class TaskStack {
    public:
     TaskStack();
     ~TaskStack();
     bool empty() const { return stack_.empty(); }
     void push(Operation task) { stack_.push(task); }
     Operation pop();
     void clear();
 
    private:
     std::stack<Operation> stack_;
+
+    DISALLOW_COPY_AND_ASSIGN(TaskStack);
   };
 
   TaskQueue task_queue_;
   TaskQueue preemptive_task_queue_;
   TaskStack abort_task_stack_;
 
   scoped_ptr<IndexedDBBackingStore::Transaction> transaction_;
   bool backing_store_transaction_begun_;
 
   bool should_process_queue_;
   int pending_preemptive_events_;
 
   std::set<IndexedDBCursor*> open_cursors_;
 
   // This timer is started after requests have been processed. If no subsequent
   // requests are processed before the timer fires, assume the script is
   // unresponsive and abort to unblock the transaction queue.
   base::OneShotTimer<IndexedDBTransaction> timeout_timer_;
 
   Diagnostics diagnostics_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_TRANSACTION_H_