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

cc/input/top_controls_manager.cc

 // Copyright 2013 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/input/top_controls_manager.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "cc/animation/keyframed_animation_curve.h"
@@ skipping 184 matching lines @@
     return;
   }
 
   if (top_controls_animation_ && animation_direction_ == direction)
     return;
 
   top_controls_animation_ = KeyframedFloatAnimationCurve::Create();
   double start_time =
       (gfx::FrameTime::Now() - base::TimeTicks()).InMillisecondsF();
   top_controls_animation_->AddKeyframe(
-      FloatKeyframe::Create(start_time, client_->ControlsTopOffset(),
-                            scoped_ptr<TimingFunction>()));
+      FloatKeyframe::Create(start_time, client_->ControlsTopOffset(), nullptr));
   float max_ending_offset =
       (direction == SHOWING_CONTROLS ? 1 : -1) * top_controls_height_;
   top_controls_animation_->AddKeyframe(
       FloatKeyframe::Create(start_time + kShowHideMaxDurationMs,
                             client_->ControlsTopOffset() + max_ending_offset,
                             EaseTimingFunction::Create()));
   animation_direction_ = direction;
   client_->DidChangeTopControlsPosition();
 }
 
@@ skipping 30 matching lines @@
 
   if ((animation_direction_ == SHOWING_CONTROLS && new_offset >= 0) ||
       (animation_direction_ == HIDING_CONTROLS
           && new_offset <= -top_controls_height_)) {
     return true;
   }
   return false;
 }
 
 }  // namespace cc