Make classes and structures in Source/core/animation fast-allocated.

Source/core/animation/LengthSVGInterpolation.h

Index: Source/core/animation/LengthSVGInterpolation.h
diff --git a/Source/core/animation/LengthSVGInterpolation.h b/Source/core/animation/LengthSVGInterpolation.h
index cd6329d0a096681e8a748b3a1b93ee6e73480a75..849df1ce35f3aa101979ba321f5da9b06f40f7d4 100644
--- a/Source/core/animation/LengthSVGInterpolation.h
+++ b/Source/core/animation/LengthSVGInterpolation.h
@@ -15,6 +15,7 @@ class LengthSVGInterpolation : public SVGInterpolation {
 public:
     typedef SVGLengthList ListType;
     struct NonInterpolableType {
+        DISALLOW_ALLOCATION();
         SVGLengthMode unitMode;
         SVGLengthNegativeValuesMode negativeValuesMode;
     };