Standardize usage of virtual/override/final specifiers.

gpu/config/gpu_control_list_version_info_unittest.cc

 // 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.
 
 #include "gpu/config/gpu_control_list.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace gpu {
 
 class VersionInfoTest : public testing::Test {
  public:
   VersionInfoTest() { }
-  virtual ~VersionInfoTest() { }
+  ~VersionInfoTest() override {}
 
   typedef GpuControlList::VersionInfo VersionInfo;
 };
 
 TEST_F(VersionInfoTest, ValidVersionInfo) {
   const std::string op[] = {
     "=",
     "<",
     "<=",
     ">",
@@ skipping 225 matching lines @@
     EXPECT_TRUE(info.Contains("8.21.100"));
     EXPECT_FALSE(info.Contains("9.002"));
     EXPECT_FALSE(info.Contains("9.201"));
     EXPECT_FALSE(info.Contains("12"));
     EXPECT_FALSE(info.Contains("12.201"));
   }
 }
 
 }  // namespace gpu