Standardize usage of virtual/override/final specifiers.

gpu/command_buffer/client/program_info_manager_unittest.cc

 // Copyright (c) 2011 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.
 
 // Tests for the Command Buffer Helper.
 
 #include "gpu/command_buffer/client/program_info_manager.h"
 #include "base/memory/scoped_ptr.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 namespace gpu {
 namespace gles2 {
 
 class ProgramInfoManagerTest : public testing::Test {
  protected:
-  virtual void SetUp() {
-  }
+  void SetUp() override {}
 
-  virtual void TearDown() {
-  }
+  void TearDown() override {}
 
   scoped_ptr<ProgramInfoManager> program_info_manager_;
 };
 
 TEST_F(ProgramInfoManagerTest, Basic) {
 }
 
 }  // namespace gles2
 }  // namespace gpu