cc: Change scoped_ptr<T>() to nullptr.

cc/layers/layer_unittest.cc

 // Copyright 2011 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/layer.h"
 
 #include "cc/animation/keyframed_animation_curve.h"
 #include "cc/base/math_util.h"
 #include "cc/layers/layer_impl.h"
 #include "cc/resources/layer_painter.h"
@@ skipping 1123 matching lines @@
   scoped_refptr<Layer> child = Layer::Create();
   root->AddChild(child);
   LayerTreeHostFactory factory;
   scoped_ptr<LayerTreeHost> layer_tree_host = factory.Create();
   layer_tree_host->SetRootLayer(root);
 }
 
 static bool AddTestAnimation(Layer* layer) {
   scoped_ptr<KeyframedFloatAnimationCurve> curve =
       KeyframedFloatAnimationCurve::Create();
-  curve->AddKeyframe(FloatKeyframe::Create(0.0,
-                                           0.3f,
-                                           scoped_ptr<TimingFunction>()));
-  curve->AddKeyframe(FloatKeyframe::Create(1.0,
-                                           0.7f,
-                                           scoped_ptr<TimingFunction>()));
+  curve->AddKeyframe(FloatKeyframe::Create(0.0, 0.3f, nullptr));
+  curve->AddKeyframe(FloatKeyframe::Create(1.0, 0.7f, nullptr));
   scoped_ptr<Animation> animation =
       Animation::Create(curve.Pass(), 0, 0, Animation::Opacity);
 
   return layer->AddAnimation(animation.Pass());
 }
 
 TEST(LayerLayerTreeHostTest, ShouldNotAddAnimationWithoutAnimationRegistrar) {
   scoped_refptr<Layer> layer = Layer::Create();
 
   // Case 1: without a LayerTreeHost and without an AnimationRegistrar, the
@@ skipping 89 matching lines @@
   root_layer->AddChild(becomes_not_draws_content);
   EXPECT_EQ(0, root_layer->NumDescendantsThatDrawContent());
 
   becomes_draws_content->SetIsDrawable(true);
   root_layer->AddChild(becomes_draws_content);
   EXPECT_EQ(1, root_layer->NumDescendantsThatDrawContent());
 }
 
 }  // namespace
 }  // namespace cc