[C++11 Allowed Features] Declares a type-safe null pointer converting from NULL to nullptr [part-…

cc/trees/layer_tree_host_unittest_animation.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/trees/layer_tree_host.h"
 
 #include "cc/animation/animation_curve.h"
 #include "cc/animation/layer_animation_controller.h"
 #include "cc/animation/scroll_offset_animation_curve.h"
 #include "cc/animation/timing_function.h"
@@ skipping 352 matching lines @@
   }
 
   virtual void BeginTest() override {
     PostAddAnimationToMainThread(layer_tree_host()->root_layer());
   }
 
   virtual void NotifyAnimationFinished(
       base::TimeTicks monotonic_time,
       Animation::TargetProperty target_property) override {
     // Replace animated commits with an empty tree.
-    layer_tree_host()->SetRootLayer(make_scoped_refptr<Layer>(NULL));
+    layer_tree_host()->SetRootLayer(make_scoped_refptr<Layer>(nullptr));
   }
 
   virtual void DidCommit() override {
     // This alternates setting an empty tree and a non-empty tree with an
     // animation.
     switch (layer_tree_host()->source_frame_number()) {
       case 1:
         // Wait for NotifyAnimationFinished to commit an empty tree.
         break;
       case 2:
@@ skipping 280 matching lines @@
     controller_impl->RemoveAnimation(animation_impl->id());
     EndTest();
   }
 
   virtual void AfterTest() override {
     // Update() should have been called once, proving that the layer was not
     // skipped.
     EXPECT_EQ(1u, update_check_layer_->update_count());
 
     // clear update_check_layer_ so LayerTreeHost dies.
-    update_check_layer_ = NULL;
+    update_check_layer_ = nullptr;
   }
 
  private:
   FakeContentLayerClient client_;
   scoped_refptr<FakeContentLayer> update_check_layer_;
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(
     LayerTreeHostAnimationTestDoNotSkipLayersWithAnimatedOpacity);
 
@@ skipping 605 matching lines @@
  private:
   scoped_refptr<Layer> content_;
   int num_swap_buffers_;
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(
     LayerTreeHostAnimationTestAddAnimationAfterAnimating);
 
 }  // namespace
 }  // namespace cc