Add composition support for SVG Web Animation of x, y, dx, dy attributes

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

Index: third_party/WebKit/Source/core/animation/SVGLengthListInterpolationType.h
diff --git a/third_party/WebKit/Source/core/animation/SVGLengthInterpolationType.h b/third_party/WebKit/Source/core/animation/SVGLengthListInterpolationType.h
similarity index 67%
copy from third_party/WebKit/Source/core/animation/SVGLengthInterpolationType.h
copy to third_party/WebKit/Source/core/animation/SVGLengthListInterpolationType.h
index d9b42ce52d7174b634bb4317b3884207bf64c145..0f8419036f79017e8b9ca17ecf7d55cb658a47df 100644
--- a/third_party/WebKit/Source/core/animation/SVGLengthInterpolationType.h
+++ b/third_party/WebKit/Source/core/animation/SVGLengthListInterpolationType.h
@@ -2,21 +2,20 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef SVGLengthInterpolationType_h
-#define SVGLengthInterpolationType_h
+#ifndef SVGLengthListInterpolationType_h
+#define SVGLengthListInterpolationType_h
 
+#include "core/SVGNames.h"
 #include "core/animation/SVGInterpolationType.h"
-
 #include "core/svg/SVGLength.h"
 
 namespace blink {
 
-class SVGLengthContext;
 enum class SVGLengthMode;
 
-class SVGLengthInterpolationType : public SVGInterpolationType {
+class SVGLengthListInterpolationType : public SVGInterpolationType {
 public:
-    SVGLengthInterpolationType(const QualifiedName& attribute)
+    SVGLengthListInterpolationType(const QualifiedName& attribute)
         : SVGInterpolationType(attribute)
         , m_unitMode(SVGLength::lengthModeForAnimatedLengthAttribute(attribute))
         , m_negativeValuesForbidden(SVGLength::negativeValuesForbiddenForAnimatedLengthAttribute(attribute))
@@ -25,8 +24,9 @@ public:
 private:
     PassOwnPtr<InterpolationValue> maybeConvertNeutral(const UnderlyingValue&, ConversionCheckers&) const final;
     PassOwnPtr<InterpolationValue> maybeConvertSVGValue(const SVGPropertyBase& svgValue) const final;
+    PassOwnPtr<PairwisePrimitiveInterpolation> mergeSingleConversions(InterpolationValue& startValue, InterpolationValue& endValue) const final;
+    void composite(UnderlyingValue&, double underlyingFraction, const InterpolationValue&) const final;
     PassRefPtrWillBeRawPtr<SVGPropertyBase> appliedSVGValue(const InterpolableValue&, const NonInterpolableValue*) const final;
-    PassRefPtrWillBeRawPtr<SVGPropertyBase> appliedSVGValue(const InterpolableValue&, const NonInterpolableValue*, const SVGLengthContext&) const;
     void apply(const InterpolableValue&, const NonInterpolableValue*, InterpolationEnvironment&) const final;
 
     const SVGLengthMode m_unitMode;
@@ -35,4 +35,4 @@ private:
 
 } // namespace blink
 
-#endif // SVGLengthInterpolationType_h
+#endif // SVGLengthListInterpolationType_h