Standardize usage of virtual/override/final specifiers.

gpu/command_buffer/tests/gl_chromium_framebuffer_multisample_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 <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 #include <GLES2/gl2extchromium.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 GLChromiumFramebufferMultisampleTest : public testing::Test {
  protected:
-  virtual void SetUp() {
-    gl_.Initialize(GLManager::Options());
-  }
+  void SetUp() override { gl_.Initialize(GLManager::Options()); }
 
-  virtual void TearDown() {
-    gl_.Destroy();
-  }
+  void TearDown() override { gl_.Destroy(); }
 
   GLManager gl_;
 };
 
 // Test that GL is at least minimally working.
 TEST_F(GLChromiumFramebufferMultisampleTest, CachedBindingsTest) {
   if (!GLTestHelper::HasExtension("GL_CHROMIUM_framebuffer_multisample")) {
     return;
   }
 
@@ skipping 117 matching lines @@
   const uint8 green[] = {0, 255, 0, 255};
   const uint8 black[] = {0, 0, 0, 0};
   glBindFramebuffer(GL_READ_FRAMEBUFFER, resolve_fbo);
   EXPECT_TRUE(
       GLTestHelper::CheckPixels(width / 4, (3 * height) / 4, 1, 1, 0, green));
   EXPECT_TRUE(GLTestHelper::CheckPixels(width - 1, 0, 1, 1, 0, black));
 }
 
 }  // namespace gpu