Standardize usage of virtual/override/final in content/renderer/

content/renderer/gpu/frame_swap_message_queue_unittest.cc

 // Copyright 2014 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.
 
 #include "content/renderer/gpu/frame_swap_message_queue.h"
 #include "ipc/ipc_message.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 
@@ skipping 237 matching lines @@
 
   DrainMessages(1, &messages);
   ASSERT_EQ(1u, messages.size());
   ASSERT_TRUE(HasMessageForId(messages, first_message_.routing_id()));
 }
 
 class NotifiesDeletionMessage : public IPC::Message {
  public:
   NotifiesDeletionMessage(bool* deleted, const IPC::Message& other)
       : IPC::Message(other), deleted_(deleted) {}
-  virtual ~NotifiesDeletionMessage() { *deleted_ = true; }
+  ~NotifiesDeletionMessage() override { *deleted_ = true; }
 
  private:
   bool* deleted_;
 };
 
 TEST_F(FrameSwapMessageQueueTest, TestDeletesNextSwapMessage) {
   bool message_deleted = false;
   QueueNextSwapMessage(make_scoped_ptr(
       new NotifiesDeletionMessage(&message_deleted, first_message_)));
   queue_ = NULL;
@@ skipping 13 matching lines @@
   bool message_deleted = false;
   QueueVisualStateMessage(1,
                           make_scoped_ptr(new NotifiesDeletionMessage(
                               &message_deleted, first_message_)));
   queue_->DidSwap(1);
   queue_ = NULL;
   ASSERT_TRUE(message_deleted);
 }
 
 }  // namespace content