Standardize usage of virtual/override/final specifiers.

gpu/command_buffer/tests/gl_lose_context_chromium_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 <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 #include <GLES2/gl2extchromium.h>
 
 #include "base/logging.h"
 #include "gpu/command_buffer/service/feature_info.h"
 #include "gpu/command_buffer/tests/gl_manager.h"
 #include "gpu/command_buffer/tests/gl_test_utils.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace gpu {
 
 class GLLoseContextTest : public testing::Test {
  protected:
-  virtual void SetUp() {
+  void SetUp() override {
     GLManager::Options options;
     gl2_.Initialize(options);
     options.context_lost_allowed = true;
     gl1a_.Initialize(options);
     options.share_group_manager = &gl1a_;
     gl1b_.Initialize(options);
   }
 
-  virtual void TearDown() {
+  void TearDown() override {
     gl1a_.Destroy();
     gl1b_.Destroy();
     gl2_.Destroy();
   }
 
   GLManager gl1a_;
   GLManager gl1b_;
   GLManager gl2_;
 };
 
@@ skipping 21 matching lines @@
   // Expect the read will fail.
   EXPECT_TRUE(GLTestHelper::CheckPixels(0, 0, 1, 1, 0, expected_no_draw));
   gl2_.MakeCurrent();
   uint8 expected_draw[] = { 0, 0, 0, 0, };
   // Expect the read will succeed.
   EXPECT_TRUE(GLTestHelper::CheckPixels(0, 0, 1, 1, 0, expected_draw));
 }
 
 }  // namespace gpu