Replaced PassRefPtr copies with moves in Source/core/animation.

third_party/WebKit/Source/core/animation/animatable/AnimatableValueKeyframe.cpp

 // Copyright 2014 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 "core/animation/animatable/AnimatableValueKeyframe.h"
 
 #include "core/animation/LegacyStyleInterpolation.h"
 
 namespace blink {
 
@@ skipping 29 matching lines @@
     return create(offset, m_easing, m_value, m_composite);
 }
 
 PassRefPtr<Interpolation> AnimatableValueKeyframe::PropertySpecificKeyframe::createInterpolation(PropertyHandle property, const Keyframe::PropertySpecificKeyframe& end) const
 {
     return LegacyStyleInterpolation::create(value(), toAnimatableValuePropertySpecificKeyframe(end).value(), property.cssProperty());
 }
 
 PassRefPtr<Keyframe::PropertySpecificKeyframe> AnimatableValueKeyframe::PropertySpecificKeyframe::neutralKeyframe(double offset, PassRefPtr<TimingFunction> easing) const
 {
-    return create(offset, easing, AnimatableValue::neutralValue(), EffectModel::CompositeAdd);
+    return create(offset, std::move(easing), AnimatableValue::neutralValue(), EffectModel::CompositeAdd);
 }
 
 } // namespace blink