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

Source/core/animation/css/CSSTimingData.h

Index: Source/core/animation/css/CSSTimingData.h
diff --git a/Source/core/animation/css/CSSTimingData.h b/Source/core/animation/css/CSSTimingData.h
index 93396f6af6a6e1d24e944a76081d1a16eed03614..05e37de41636b42c7f85ab982b6ddf8fef6500f1 100644
--- a/Source/core/animation/css/CSSTimingData.h
+++ b/Source/core/animation/css/CSSTimingData.h
@@ -7,6 +7,7 @@
 
 #include "platform/animation/TimingFunction.h"
 #include "platform/heap/Handle.h"
+#include "wtf/Allocator.h"
 #include "wtf/Vector.h"
 
 namespace blink {
@@ -14,6 +15,7 @@ namespace blink {
 struct Timing;
 
 class CSSTimingData {
+    WTF_MAKE_FAST_ALLOCATED(CSSTimingData);
 public:
     ~CSSTimingData() { }