Delete unused AnimatableValue code

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

Index: third_party/WebKit/Source/core/animation/StringKeyframe.h
diff --git a/third_party/WebKit/Source/core/animation/StringKeyframe.h b/third_party/WebKit/Source/core/animation/StringKeyframe.h
index 7c39dc39a40204deb482d98468d2fe74d4ed0693..02b80b5706dd9a94cb4283941838d2a1ac2f8dbe 100644
--- a/third_party/WebKit/Source/core/animation/StringKeyframe.h
+++ b/third_party/WebKit/Source/core/animation/StringKeyframe.h
@@ -16,7 +16,7 @@ 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);