Standardize usage of virtual/override/final specifiers.

content/browser/renderer_host/media/media_stream_ui_proxy_unittest.cc

 // Copyright 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.
 
 #include "content/browser/renderer_host/media/media_stream_ui_proxy.h"
 
 #include "base/message_loop/message_loop.h"
 #include "content/browser/frame_host/render_frame_host_delegate.h"
 #include "content/public/common/renderer_preferences.h"
 #include "content/public/test/test_browser_thread.h"
@@ skipping 41 matching lines @@
 }  // namespace
 
 class MediaStreamUIProxyTest : public testing::Test {
  public:
   MediaStreamUIProxyTest()
       : ui_thread_(BrowserThread::UI, &message_loop_),
         io_thread_(BrowserThread::IO, &message_loop_) {
     proxy_ = MediaStreamUIProxy::CreateForTests(&delegate_);
   }
 
-  virtual ~MediaStreamUIProxyTest() {
+  ~MediaStreamUIProxyTest() override {
     proxy_.reset();
     message_loop_.RunUntilIdle();
   }
 
  protected:
   base::MessageLoop message_loop_;
   TestBrowserThread ui_thread_;
   TestBrowserThread io_thread_;
 
   MockRenderFrameHostDelegate delegate_;
@@ skipping 183 matching lines @@
                            0,
                            0,
                            base::Bind(&MockResponseCallback::OnCheckResponse,
                                       base::Unretained(&response_callback_)));
   EXPECT_CALL(delegate_, CheckMediaAccessPermission(_, _));
   EXPECT_CALL(response_callback_, OnCheckResponse(_));
   message_loop_.RunUntilIdle();
 }
 
 }  // content