LibWeb: Put most LibWeb GC objects in type-specific heap blocks

With this change, we now have ~1200 CellAllocators across both LibJS and
LibWeb in a normal WebContent instance.

This gives us a minimum heap size of 4.7 MiB in the scenario where we
only have one cell allocated per type. Of course, in practice there will
be many more of each type, so the effective overhead is quite a bit
smaller than that in practice.

I left a few types unconverted to this mechanism because I got tired of
doing this. :^)

Userland/Libraries/LibWeb/Animations/Animation.cpp

@@ -17,6 +17,8 @@
 
 namespace Web::Animations {
 
+JS_DEFINE_ALLOCATOR(Animation);
+
 // https://www.w3.org/TR/web-animations-1/#dom-animation-animation
 JS::NonnullGCPtr<Animation> Animation::create(JS::Realm& realm, JS::GCPtr<AnimationEffect> effect, JS::GCPtr<AnimationTimeline> timeline)
 {

Userland/Libraries/LibWeb/Animations/Animation.h

@@ -15,6 +15,7 @@ namespace Web::Animations {
 // https://www.w3.org/TR/web-animations-1/#the-animation-interface
 class Animation : public DOM::EventTarget {
     WEB_PLATFORM_OBJECT(Animation, DOM::EventTarget);
+    JS_DECLARE_ALLOCATOR(Animation);
 
 public:
     static JS::NonnullGCPtr<Animation> create(JS::Realm&, JS::GCPtr<AnimationEffect>, JS::GCPtr<AnimationTimeline>);

Userland/Libraries/LibWeb/Animations/AnimationEffect.cpp

@@ -12,6 +12,8 @@
 
 namespace Web::Animations {
 
+JS_DEFINE_ALLOCATOR(AnimationEffect);
+
 JS::NonnullGCPtr<AnimationEffect> AnimationEffect::create(JS::Realm& realm)
 {
     return realm.heap().allocate<AnimationEffect>(realm, realm);

Userland/Libraries/LibWeb/Animations/AnimationEffect.h

@@ -58,6 +58,7 @@ enum class AnimationDirection {
 // https://www.w3.org/TR/web-animations-1/#the-animationeffect-interface
 class AnimationEffect : public Bindings::PlatformObject {
     WEB_PLATFORM_OBJECT(AnimationEffect, Bindings::PlatformObject);
+    JS_DECLARE_ALLOCATOR(AnimationEffect);
 
 public:
     static JS::NonnullGCPtr<AnimationEffect> create(JS::Realm&);

Userland/Libraries/LibWeb/Animations/AnimationPlaybackEvent.cpp

@@ -9,6 +9,8 @@
 
 namespace Web::Animations {
 
+JS_DEFINE_ALLOCATOR(AnimationPlaybackEvent);
+
 JS::NonnullGCPtr<AnimationPlaybackEvent> AnimationPlaybackEvent::create(JS::Realm& realm, FlyString const& event_name, AnimationPlaybackEventInit const& event_init)
 {
     return realm.heap().allocate<AnimationPlaybackEvent>(realm, realm, event_name, event_init);

Userland/Libraries/LibWeb/Animations/AnimationPlaybackEvent.h

@@ -20,6 +20,7 @@ struct AnimationPlaybackEventInit : public DOM::EventInit {
 // https://www.w3.org/TR/web-animations-1/#animationplaybackevent
 class AnimationPlaybackEvent : public DOM::Event {
     WEB_PLATFORM_OBJECT(AnimationPlaybackEvent, DOM::Event);
+    JS_DECLARE_ALLOCATOR(AnimationPlaybackEvent);
 
 public:
     [[nodiscard]] static JS::NonnullGCPtr<AnimationPlaybackEvent> create(JS::Realm&, FlyString const& event_name, AnimationPlaybackEventInit const& event_init = {});

Userland/Libraries/LibWeb/Animations/AnimationTimeline.cpp

@@ -10,6 +10,8 @@
 
 namespace Web::Animations {
 
+JS_DEFINE_ALLOCATOR(AnimationTimeline);
+
 WebIDL::ExceptionOr<void> AnimationTimeline::set_current_time(Optional<double> value)
 {
     if (value == m_current_time)

Userland/Libraries/LibWeb/Animations/AnimationTimeline.h

@@ -13,6 +13,7 @@ namespace Web::Animations {
 // https://www.w3.org/TR/web-animations-1/#animationtimeline
 class AnimationTimeline : public Bindings::PlatformObject {
     WEB_PLATFORM_OBJECT(AnimationTimeline, Bindings::PlatformObject);
+    JS_DECLARE_ALLOCATOR(AnimationTimeline);
 
 public:
     Optional<double> current_time() const { return m_current_time; }

Userland/Libraries/LibWeb/Animations/DocumentTimeline.cpp

@@ -13,6 +13,8 @@
 
 namespace Web::Animations {
 
+JS_DEFINE_ALLOCATOR(DocumentTimeline);
+
 JS::NonnullGCPtr<DocumentTimeline> DocumentTimeline::create(JS::Realm& realm, DOM::Document& document, HighResolutionTime::DOMHighResTimeStamp origin_time)
 {
     return realm.heap().allocate<DocumentTimeline>(realm, realm, document, origin_time);

Userland/Libraries/LibWeb/Animations/DocumentTimeline.h

@@ -20,6 +20,7 @@ struct DocumentTimelineOptions {
 // https://www.w3.org/TR/web-animations-1/#the-documenttimeline-interface
 class DocumentTimeline : public AnimationTimeline {
     WEB_PLATFORM_OBJECT(DocumentTimeline, AnimationTimeline);
+    JS_DECLARE_ALLOCATOR(DocumentTimeline);
 
 public:
     static JS::NonnullGCPtr<DocumentTimeline> create(JS::Realm&, DOM::Document&, HighResolutionTime::DOMHighResTimeStamp origin_time);

Userland/Libraries/LibWeb/Animations/KeyframeEffect.h

@@ -39,6 +39,7 @@ struct BaseKeyframe {
 // https://www.w3.org/TR/web-animations-1/#the-keyframeeffect-interface
 class KeyframeEffect : public AnimationEffect {
     WEB_PLATFORM_OBJECT(KeyframeEffect, AnimationEffect);
+    JS_DECLARE_ALLOCATOR(KeyframeEffect);
 
 public:
     static JS::NonnullGCPtr<KeyframeEffect> create(JS::Realm&);