Fewer reused duplicate symbol names in animation.

third_party/WebKit/Source/core/animation/CSSBorderImageLengthBoxInterpolationType.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/CSSBorderImageLengthBoxInterpolationType.h"
 
 #include <memory>
 #include "core/animation/BorderImageLengthBoxPropertyFunctions.h"
 #include "core/animation/LengthInterpolationFunctions.h"
+#include "core/animation/SideIndex.h"
 #include "core/css/CSSIdentifierValue.h"
 #include "core/css/CSSQuadValue.h"
 #include "core/css/resolver/StyleResolverState.h"
 #include "wtf/PtrUtil.h"
 
 namespace blink {
 
 namespace {
 
-enum SideIndex : unsigned {
-  SideTop,
-  SideRight,
-  SideBottom,
-  SideLeft,
-  SideIndexCount,
-};
-
 enum class SideType {
   Number,
   Auto,
   Length,
 };
 
 SideType getSideType(const BorderImageLength& side) {
   if (side.isNumber()) {
     return SideType::Number;
   }
@@ skipping 358 matching lines @@
         return Length(Auto);
     }
   };
   BorderImageLengthBox box(convertSide(SideTop), convertSide(SideRight),
                            convertSide(SideBottom), convertSide(SideLeft));
   BorderImageLengthBoxPropertyFunctions::setBorderImageLengthBox(
       cssProperty(), *state.style(), box);
 }
 
 }  // namespace blink