InlinedVisitor: Migrate animation to use inlined tracing

Source/core/animation/SVGLengthStyleInterpolation.h

 // Copyright 2015 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 SVGLengthStyleInterpolation_h
 #define SVGLengthStyleInterpolation_h
 
 #include "core/animation/StyleInterpolation.h"
 #include "core/css/CSSPrimitiveValue.h"
 #include "platform/Length.h"
 
 namespace blink {
 
 class SVGLengthStyleInterpolation : public StyleInterpolation {
 public:
     static PassRefPtrWillBeRawPtr<SVGLengthStyleInterpolation> maybeCreate(const CSSValue& start, const CSSValue& end, CSSPropertyID, InterpolationRange);
 
     virtual void apply(StyleResolverState&) const override;
 
-    virtual void trace(Visitor* visitor) override
+    DEFINE_INLINE_VIRTUAL_TRACE()
     {
         StyleInterpolation::trace(visitor);
     }
 
 private:
     SVGLengthStyleInterpolation(const CSSPrimitiveValue& start, const CSSPrimitiveValue& end, CSSPropertyID, CSSPrimitiveValue::UnitType, InterpolationRange);
 
     static bool canCreateFrom(const CSSValue&);
     static PassOwnPtrWillBeRawPtr<InterpolableValue> lengthToInterpolableValue(const CSSPrimitiveValue&);
     static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> interpolableValueToLength(const InterpolableValue&, CSSPrimitiveValue::UnitType, InterpolationRange);
 
     CSSPrimitiveValue::UnitType m_type;
     InterpolationRange m_range;
 
     friend class AnimationSVGLengthStyleInterpolationTest;
 };
 
 }
 
 #endif // SVGLengthStyleInterpolation_h