Standardize usage of virtual/override/final in cc/

cc/layers/heads_up_display_unittest.cc

 // Copyright 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 "cc/layers/heads_up_display_layer.h"
 #include "cc/layers/layer.h"
 #include "cc/test/layer_tree_test.h"
 #include "cc/trees/layer_tree_host.h"
 
 namespace cc {
 namespace {
 
 class HeadsUpDisplayTest : public LayerTreeTest {
  protected:
-  virtual void InitializeSettings(LayerTreeSettings* settings) override {
+  void InitializeSettings(LayerTreeSettings* settings) override {
     // Enable the HUD without requiring text.
     settings->initial_debug_state.show_property_changed_rects = true;
   }
 };
 
 class DrawsContentLayer : public Layer {
  public:
   static scoped_refptr<DrawsContentLayer> Create() {
     return make_scoped_refptr(new DrawsContentLayer());
   }
-  virtual bool DrawsContent() const override { return true; }
+  bool DrawsContent() const override { return true; }
 
  private:
   DrawsContentLayer() : Layer() {}
-  virtual ~DrawsContentLayer() {}
+  ~DrawsContentLayer() override {}
 };
 
 class HudWithRootLayerChange : public HeadsUpDisplayTest {
  public:
   HudWithRootLayerChange()
       : root_layer1_(DrawsContentLayer::Create()),
         root_layer2_(DrawsContentLayer::Create()),
         num_commits_(0) {}
 
-  virtual void BeginTest() override {
+  void BeginTest() override {
     root_layer1_->SetBounds(gfx::Size(30, 30));
     root_layer2_->SetBounds(gfx::Size(30, 30));
 
     PostSetNeedsCommitToMainThread();
   }
 
-  virtual void DidCommit() override {
+  void DidCommit() override {
     ++num_commits_;
 
     ASSERT_TRUE(layer_tree_host()->hud_layer());
 
     switch (num_commits_) {
       case 1:
         // Change directly to a new root layer.
         layer_tree_host()->SetRootLayer(root_layer1_);
         break;
       case 2:
@@ skipping 21 matching lines @@
         // Change directly back to the last root layer/
         layer_tree_host()->SetRootLayer(root_layer1_);
         break;
       case 7:
         EXPECT_EQ(root_layer1_.get(), layer_tree_host()->hud_layer()->parent());
         EndTest();
         break;
     }
   }
 
-  virtual void AfterTest() override {}
+  void AfterTest() override {}
 
  private:
   scoped_refptr<DrawsContentLayer> root_layer1_;
   scoped_refptr<DrawsContentLayer> root_layer2_;
   int num_commits_;
 };
 
 MULTI_THREAD_TEST_F(HudWithRootLayerChange);
 
 }  // namespace
 }  // namespace cc