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

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 {
@@ skipping 39 matching lines @@
     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:
         EXPECT_EQ(root_layer1_.get(), layer_tree_host()->hud_layer()->parent());
         // Unset the root layer.
-        layer_tree_host()->SetRootLayer(NULL);
+        layer_tree_host()->SetRootLayer(nullptr);
         break;
       case 3:
         EXPECT_EQ(0, layer_tree_host()->hud_layer()->parent());
         // Change back to the previous root layer.
         layer_tree_host()->SetRootLayer(root_layer1_);
         break;
       case 4:
         EXPECT_EQ(root_layer1_.get(), layer_tree_host()->hud_layer()->parent());
         // Unset the root layer.
-        layer_tree_host()->SetRootLayer(NULL);
+        layer_tree_host()->SetRootLayer(nullptr);
         break;
       case 5:
         EXPECT_EQ(0, layer_tree_host()->hud_layer()->parent());
         // Change to a new root layer from a null root.
         layer_tree_host()->SetRootLayer(root_layer2_);
         break;
       case 6:
         EXPECT_EQ(root_layer2_.get(), layer_tree_host()->hud_layer()->parent());
         // Change directly back to the last root layer/
         layer_tree_host()->SetRootLayer(root_layer1_);
@@ skipping 10 matching lines @@
  private:
   scoped_refptr<DrawsContentLayer> root_layer1_;
   scoped_refptr<DrawsContentLayer> root_layer2_;
   int num_commits_;
 };
 
 MULTI_THREAD_TEST_F(HudWithRootLayerChange);
 
 }  // namespace
 }  // namespace cc