Standardize usage of virtual/override/final specifiers.

media/base/video_util_unittest.cc

 // 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.
 
 #include "base/memory/scoped_ptr.h"
 #include "media/base/video_frame.h"
 #include "media/base/video_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace media {
 
 class VideoUtilTest : public testing::Test {
  public:
   VideoUtilTest()
       : height_(0),
         y_stride_(0),
         u_stride_(0),
         v_stride_(0) {
   }
 
-  virtual ~VideoUtilTest() {}
+  ~VideoUtilTest() override {}
 
   void CreateSourceFrame(int width, int height,
                          int y_stride, int u_stride, int v_stride) {
     EXPECT_GE(y_stride, width);
     EXPECT_GE(u_stride, width / 2);
     EXPECT_GE(v_stride, width / 2);
 
     height_ = height;
     y_stride_ = y_stride;
     u_stride_ = u_stride;
@@ skipping 350 matching lines @@
                         inside ? 0x03 : 0x80);
             }
           }
         }
       }
     }
   }
 }
 
 }  // namespace media