Revert of Add additive animation support for border-radius CSS properties

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

Index: third_party/WebKit/Source/core/animation/CSSLengthPairInterpolationType.h
diff --git a/third_party/WebKit/Source/core/animation/CSSLengthPairInterpolationType.h b/third_party/WebKit/Source/core/animation/CSSLengthPairInterpolationType.h
deleted file mode 100644
index 750f9510792ccc717cbf5445ac999c22cc848362..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/core/animation/CSSLengthPairInterpolationType.h
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright 2016 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 CSSLengthPairInterpolationType_h
-#define CSSLengthPairInterpolationType_h
-
-#include "core/animation/CSSLengthInterpolationType.h"
-#include "core/animation/CSSLengthListInterpolationType.h"
-#include "core/animation/ListInterpolationFunctions.h"
-#include "core/css/CSSValuePair.h"
-
-namespace blink {
-
-class CSSLengthPairInterpolationType : public CSSLengthListInterpolationType {
-public:
-    CSSLengthPairInterpolationType(CSSPropertyID property)
-        : CSSLengthListInterpolationType(property)
-    { }
-
-private:
-    InterpolationValue maybeConvertValue(const CSSValue& value, const StyleResolverState&, ConversionCheckers&) const final
-    {
-        const CSSValuePair& pair = toCSSValuePair(value);
-        return ListInterpolationFunctions::createList(2, [&pair](size_t index) {
-            return CSSLengthInterpolationType::maybeConvertCSSValue(index == 0 ? pair.first() : pair.second());
-        });
-    }
-};
-
-} // namespace blink
-
-#endif // CSSLengthPairInterpolationType_h