Standardize usage of virtual/override/final specifiers.

gpu/command_buffer/tests/gl_depth_texture_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 "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"
 
 #define SHADER(Src) #Src
 
 namespace gpu {
 
 class DepthTextureTest : public testing::Test {
  protected:
   static const GLsizei kResolution = 64;
-  virtual void SetUp() {
+  void SetUp() override {
     GLManager::Options options;
     options.size = gfx::Size(kResolution, kResolution);
     gl_.Initialize(options);
   }
 
-  virtual void TearDown() {
-    gl_.Destroy();
-  }
+  void TearDown() override { gl_.Destroy(); }
 
   GLuint SetupUnitQuad(GLint position_location);
 
   GLManager gl_;
 };
 
 GLuint DepthTextureTest::SetupUnitQuad(GLint position_location) {
   GLuint vbo = 0;
   glGenBuffers(1, &vbo);
   glBindBuffer(GL_ARRAY_BUFFER, vbo);
@@ skipping 191 matching lines @@
 
     GLTestHelper::CheckGLError("no errors after everything", __LINE__);
   }
 }
 
 }  // namespace gpu