Standardize usage of virtual/override/final specifiers.

gpu/command_buffer/service/id_manager_unittest.cc

 // Copyright (c) 2010 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/command_buffer/service/id_manager.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace gpu {
 namespace gles2 {
 
 class IdManagerTest : public testing::Test {
  public:
   IdManagerTest() {
   }
 
  protected:
-  virtual void SetUp() {
-  }
+  void SetUp() override {}
 
-  virtual void TearDown() {
-  }
+  void TearDown() override {}
 
   IdManager manager_;
 };
 
 TEST_F(IdManagerTest, Basic) {
   const GLuint kClientId1 = 1;
   const GLuint kClientId2 = 2;
   const GLuint kServiceId1 = 201;
   const GLuint kServiceId2 = 202;
   // Check we can add an id
@@ skipping 35 matching lines @@
   EXPECT_FALSE(manager_.RemoveMapping(kClientId1, kServiceId2));
   // Check we get an error if we try to map an existing id.
   EXPECT_FALSE(manager_.AddMapping(kClientId2, kServiceId2));
   EXPECT_FALSE(manager_.AddMapping(kClientId2, kServiceId1));
 }
 
 }  // namespace gles2
 }  // namespace gpu