CSSValue Immediates: Make CSSPrimitiveValue store a tagged pointer

Source/core/css/CSSValueObject.h

Index: Source/core/css/CSSValueObject.h
diff --git a/Source/core/css/CSSValueObject.h b/Source/core/css/CSSValueObject.h
index 535e95bc89ec3ea52e5ea787ac5a3b3efaa8ead2..ab4ab5039cd4381f3d763718746f43d4f878e28e 100644
--- a/Source/core/css/CSSValueObject.h
+++ b/Source/core/css/CSSValueObject.h
@@ -41,7 +41,7 @@ public:
     static void* allocateObject(size_t size, bool isEager)
     {
         ThreadState* state = ThreadStateFor<ThreadingTrait<CSSValueObject>::Affinity>::state();
-        return Heap::allocateOnHeapIndex(state, size, isEager ? ThreadState::EagerSweepHeapIndex : ThreadState::CSSValueHeapIndex, GCInfoTrait<CSSValueObject>::index());
+        return Heap::allocateOnHeapIndex(state, size, isEager ? ThreadState::EagerSweepHeapIndex : ThreadState::CSSValueObjectHeapIndex, GCInfoTrait<CSSValueObject>::index());
     }
 #else
     // Override RefCounted's deref() to ensure operator delete is called on