Fewer reused duplicate symbol names in animation.

third_party/WebKit/Source/core/animation/CSSImageSliceInterpolationType.cpp

 // 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.
 
 #include "core/animation/CSSImageSliceInterpolationType.h"
 
+#include <memory>
 #include "core/animation/CSSLengthInterpolationType.h"
 #include "core/animation/ImageSlicePropertyFunctions.h"
+#include "core/animation/SideIndex.h"
 #include "core/css/CSSBorderImageSliceValue.h"
 #include "core/css/resolver/StyleResolverState.h"
 #include "wtf/PtrUtil.h"
-#include <memory>
 
 namespace blink {
 
 namespace {
 
-enum SideIndex : unsigned {
-  SideTop,
-  SideRight,
-  SideBottom,
-  SideLeft,
-  SideIndexCount,
-};
-
 struct SliceTypes {
   explicit SliceTypes(const ImageSlice& slice) {
     isNumber[SideTop] = slice.slices.top().isFixed();
     isNumber[SideRight] = slice.slices.right().isFixed();
     isNumber[SideBottom] = slice.slices.bottom().isFixed();
     isNumber[SideLeft] = slice.slices.left().isFixed();
     fill = slice.fill;
   }
   explicit SliceTypes(const CSSBorderImageSliceValue& slice) {
     isNumber[SideTop] = slice.slices().top()->isPrimitiveValue() &&
@@ skipping 238 matching lines @@
     return types.isNumber[index] ? Length(value * style.effectiveZoom(), Fixed)
                                  : Length(value, Percent);
   };
   LengthBox box(convertSide(SideTop), convertSide(SideRight),
                 convertSide(SideBottom), convertSide(SideLeft));
   ImageSlicePropertyFunctions::setImageSlice(cssProperty(), style,
                                              ImageSlice(box, types.fill));
 }
 
 }  // namespace blink