[web-animations] add missing `DECLARE/DEFINE_ALLOCATOR_WITH_HEAP_IDEN…

…TIFIER` for `NonNormalizedDiscretePropertyWrapper`

https://bugs.webkit.org/show_bug.cgi?id=270459

Reviewed by Chris Dumez.

We forgot to add `DECLARE_ALLOCATOR_WITH_HEAP_IDENTIFIER` and `DEFINE_ALLOCATOR_WITH_HEAP_IDENTIFIER`
calls when we added `NonNormalizedDiscretePropertyWrapper` in 273742@main.

* Source/WebCore/animation/CSSPropertyAnimation.cpp:

Canonical link: https://commits.webkit.org/275644@main

Source/WebCore/animation/CSSPropertyAnimation.cpp

@@ -3582,6 +3582,7 @@ class CSSPropertyAnimationWrapperMap final {
 };
 DEFINE_ALLOCATOR_WITH_HEAP_IDENTIFIER(CSSPropertyAnimationWrapperMap);
 
+DECLARE_ALLOCATOR_WITH_HEAP_IDENTIFIER(NonNormalizedDiscretePropertyWrapper);
 template <typename T>
 class NonNormalizedDiscretePropertyWrapper final : public PropertyWrapper<T> {
     WTF_MAKE_FAST_ALLOCATED_WITH_HEAP_IDENTIFIER(NonNormalizedDiscretePropertyWrapper);
@@ -3595,6 +3596,7 @@ class NonNormalizedDiscretePropertyWrapper final : public PropertyWrapper<T> {
     bool canInterpolate(const RenderStyle&, const RenderStyle&, CompositeOperation) const final { return false; }
     bool normalizesProgressForDiscreteInterpolation() const final { return false; }
 };
+DEFINE_ALLOCATOR_WITH_HEAP_IDENTIFIER(NonNormalizedDiscretePropertyWrapper);
 
 CSSPropertyAnimationWrapperMap::CSSPropertyAnimationWrapperMap()
 {