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

cc/layers/heads_up_display_unittest.cc

Index: cc/layers/heads_up_display_unittest.cc
diff --git a/cc/layers/heads_up_display_unittest.cc b/cc/layers/heads_up_display_unittest.cc
index 686338e048573c3146183517bdc1f81883b8d7fa..37d40a87078e9c813c31d775f5ff065e6bff8ada 100644
--- a/cc/layers/heads_up_display_unittest.cc
+++ b/cc/layers/heads_up_display_unittest.cc
@@ -57,7 +57,7 @@ class HudWithRootLayerChange : public HeadsUpDisplayTest {
       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());
@@ -67,7 +67,7 @@ class HudWithRootLayerChange : public HeadsUpDisplayTest {
       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());