Delete unused AnimatableValue code

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

 // Copyright 2014 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 StringKeyframe_h
 #define StringKeyframe_h
 
 #include "core/animation/Keyframe.h"
 #include "core/css/StylePropertySet.h"
 
 #include "wtf/HashMap.h"
 
 namespace blink {
 
 class StyleSheetContents;
 
 // A specialization of Keyframe that associates user specified keyframe
 // properties with either CSS properties or SVG attributes.
-class StringKeyframe : public Keyframe {
+class CORE_EXPORT StringKeyframe : public Keyframe {
  public:
   static PassRefPtr<StringKeyframe> create() {
     return adoptRef(new StringKeyframe);
   }
 
   MutableStylePropertySet::SetResult setCSSPropertyValue(
       const AtomicString& propertyName,
       const PropertyRegistry*,
       const String& value,
       StyleSheetContents*);
@@ skipping 151 matching lines @@
                   value.isCSSPropertySpecificKeyframe());
 DEFINE_TYPE_CASTS(SVGPropertySpecificKeyframe,
                   Keyframe::PropertySpecificKeyframe,
                   value,
                   value->isSVGPropertySpecificKeyframe(),
                   value.isSVGPropertySpecificKeyframe());
 
 }  // namespace blink
 
 #endif