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

third_party/WebKit/Source/core/animation/LegacyStyleInterpolation.h

 // 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.
 
 #ifndef LegacyStyleInterpolation_h
 #define LegacyStyleInterpolation_h
 
 #include "core/animation/StyleInterpolation.h"
 #include "core/css/resolver/AnimatedStyleBuilder.h"
 #include <memory>
 
 namespace blink {
 
 class LegacyStyleInterpolation : public StyleInterpolation {
 public:
     static PassRefPtr<LegacyStyleInterpolation> create(PassRefPtr<AnimatableValue> start, PassRefPtr<AnimatableValue> end, CSSPropertyID id)
     {
-        return adoptRef(new LegacyStyleInterpolation(InterpolableAnimatableValue::create(start), InterpolableAnimatableValue::create(end), id));
+        return adoptRef(new LegacyStyleInterpolation(InterpolableAnimatableValue::create(std::move(start)), InterpolableAnimatableValue::create(std::move(end)), id));
     }
 
     void apply(StyleResolverState& state) const override
     {
         AnimatedStyleBuilder::applyProperty(m_id, state, currentValue().get());
     }
 
     bool isLegacyStyleInterpolation() const final { return true; }
     PassRefPtr<AnimatableValue> currentValue() const
     {
         return toInterpolableAnimatableValue(m_cachedValue.get())->value();
     }
 
 private:
     LegacyStyleInterpolation(std::unique_ptr<InterpolableValue> start, std::unique_ptr<InterpolableValue> end, CSSPropertyID id)
         : StyleInterpolation(std::move(start), std::move(end), id)
     {
     }
 };
 
 DEFINE_TYPE_CASTS(LegacyStyleInterpolation, Interpolation, value, value->isLegacyStyleInterpolation(), value.isLegacyStyleInterpolation());
 
 } // namespace blink
 
 #endif