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/Geometry/DOMMatrix.cpp

@@ -12,6 +12,8 @@
 
 namespace Web::Geometry {
 
+JS_DEFINE_ALLOCATOR(DOMMatrix);
+
 WebIDL::ExceptionOr<JS::NonnullGCPtr<DOMMatrix>> DOMMatrix::construct_impl(JS::Realm& realm, Optional<Variant<String, Vector<double>>> const& init)
 {
     auto& vm = realm.vm();

Userland/Libraries/LibWeb/Geometry/DOMMatrix.h

@@ -14,6 +14,7 @@ namespace Web::Geometry {
 // https://drafts.fxtf.org/geometry/#dommatrix
 class DOMMatrix : public DOMMatrixReadOnly {
     WEB_PLATFORM_OBJECT(DOMMatrix, Bindings::PlatformObject);
+    JS_DECLARE_ALLOCATOR(DOMMatrix);
 
 public:
     static WebIDL::ExceptionOr<JS::NonnullGCPtr<DOMMatrix>> construct_impl(JS::Realm&, Optional<Variant<String, Vector<double>>> const& init);

Userland/Libraries/LibWeb/Geometry/DOMPoint.cpp

@@ -10,6 +10,8 @@
 
 namespace Web::Geometry {
 
+JS_DEFINE_ALLOCATOR(DOMPoint);
+
 JS::NonnullGCPtr<DOMPoint> DOMPoint::construct_impl(JS::Realm& realm, double x, double y, double z, double w)
 {
     return realm.heap().allocate<DOMPoint>(realm, realm, x, y, z, w);

Userland/Libraries/LibWeb/Geometry/DOMPoint.h

@@ -14,6 +14,7 @@ namespace Web::Geometry {
 // https://drafts.fxtf.org/geometry/#DOMPoint
 class DOMPoint final : public DOMPointReadOnly {
     WEB_PLATFORM_OBJECT(DOMPoint, DOMPointReadOnly);
+    JS_DECLARE_ALLOCATOR(DOMPoint);
 
 public:
     static JS::NonnullGCPtr<DOMPoint> construct_impl(JS::Realm&, double x = 0, double y = 0, double z = 0, double w = 1);

Userland/Libraries/LibWeb/Geometry/DOMPointReadOnly.cpp

@@ -12,6 +12,8 @@
 
 namespace Web::Geometry {
 
+JS_DEFINE_ALLOCATOR(DOMPointReadOnly);
+
 JS::NonnullGCPtr<DOMPointReadOnly> DOMPointReadOnly::construct_impl(JS::Realm& realm, double x, double y, double z, double w)
 {
     return realm.heap().allocate<DOMPointReadOnly>(realm, realm, x, y, z, w);

Userland/Libraries/LibWeb/Geometry/DOMPointReadOnly.h

@@ -23,6 +23,7 @@ struct DOMPointInit {
 // https://drafts.fxtf.org/geometry/#dompointreadonly
 class DOMPointReadOnly : public Bindings::PlatformObject {
     WEB_PLATFORM_OBJECT(DOMPointReadOnly, Bindings::PlatformObject);
+    JS_DECLARE_ALLOCATOR(DOMPointReadOnly);
 
 public:
     static JS::NonnullGCPtr<DOMPointReadOnly> construct_impl(JS::Realm&, double x = 0, double y = 0, double z = 0, double w = 1);

Userland/Libraries/LibWeb/Geometry/DOMQuad.cpp

@@ -9,6 +9,8 @@
 
 namespace Web::Geometry {
 
+JS_DEFINE_ALLOCATOR(DOMQuad);
+
 JS::NonnullGCPtr<DOMQuad> DOMQuad::construct_impl(JS::Realm& realm, DOMPointInit const& p1, DOMPointInit const& p2, DOMPointInit const& p3, DOMPointInit const& p4)
 {
     return realm.heap().allocate<DOMQuad>(realm, realm, p1, p2, p3, p4);

Userland/Libraries/LibWeb/Geometry/DOMQuad.h

@@ -24,6 +24,7 @@ struct DOMQuadInit {
 // https://drafts.fxtf.org/geometry/#domquad
 class DOMQuad : public Bindings::PlatformObject {
     WEB_PLATFORM_OBJECT(DOMQuad, Bindings::PlatformObject);
+    JS_DECLARE_ALLOCATOR(DOMQuad);
 
 public:
     static JS::NonnullGCPtr<DOMQuad> construct_impl(JS::Realm&, DOMPointInit const& p1, DOMPointInit const& p2, DOMPointInit const& p3, DOMPointInit const& p4);

Userland/Libraries/LibWeb/Geometry/DOMRect.cpp

@@ -10,6 +10,8 @@
 
 namespace Web::Geometry {
 
+JS_DEFINE_ALLOCATOR(DOMRect);
+
 WebIDL::ExceptionOr<JS::NonnullGCPtr<DOMRect>> DOMRect::construct_impl(JS::Realm& realm, double x, double y, double width, double height)
 {
     return create(realm, Gfx::FloatRect { x, y, width, height });

Userland/Libraries/LibWeb/Geometry/DOMRect.h

@@ -13,6 +13,7 @@ namespace Web::Geometry {
 // https://drafts.fxtf.org/geometry/#DOMRect
 class DOMRect final : public DOMRectReadOnly {
     WEB_PLATFORM_OBJECT(DOMRect, DOMRectReadOnly);
+    JS_DECLARE_ALLOCATOR(DOMRect);
 
 public:
     static WebIDL::ExceptionOr<JS::NonnullGCPtr<DOMRect>> construct_impl(JS::Realm&, double x = 0, double y = 0, double width = 0, double height = 0);

Userland/Libraries/LibWeb/Geometry/DOMRectList.cpp

@@ -12,6 +12,8 @@
 
 namespace Web::Geometry {
 
+JS_DEFINE_ALLOCATOR(DOMRectList);
+
 JS::NonnullGCPtr<DOMRectList> DOMRectList::create(JS::Realm& realm, Vector<JS::Handle<DOMRect>> rect_handles)
 {
     Vector<JS::NonnullGCPtr<DOMRect>> rects;

Userland/Libraries/LibWeb/Geometry/DOMRectList.h

@@ -16,6 +16,7 @@ namespace Web::Geometry {
 // https://drafts.fxtf.org/geometry-1/#DOMRectList
 class DOMRectList final : public Bindings::LegacyPlatformObject {
     WEB_PLATFORM_OBJECT(DOMRectList, Bindings::LegacyPlatformObject);
+    JS_DECLARE_ALLOCATOR(DOMRectList);
 
 public:
     [[nodiscard]] static JS::NonnullGCPtr<DOMRectList> create(JS::Realm&, Vector<JS::Handle<DOMRect>>);

Userland/Libraries/LibWeb/Geometry/DOMRectReadOnly.cpp

@@ -10,6 +10,8 @@
 
 namespace Web::Geometry {
 
+JS_DEFINE_ALLOCATOR(DOMRectReadOnly);
+
 WebIDL::ExceptionOr<JS::NonnullGCPtr<DOMRectReadOnly>> DOMRectReadOnly::construct_impl(JS::Realm& realm, double x, double y, double width, double height)
 {
     return realm.heap().allocate<DOMRectReadOnly>(realm, realm, x, y, width, height);

Userland/Libraries/LibWeb/Geometry/DOMRectReadOnly.h

@@ -23,6 +23,7 @@ struct DOMRectInit {
 // https://drafts.fxtf.org/geometry/#domrectreadonly
 class DOMRectReadOnly : public Bindings::PlatformObject {
     WEB_PLATFORM_OBJECT(DOMRectReadOnly, Bindings::PlatformObject);
+    JS_DECLARE_ALLOCATOR(DOMRectReadOnly);
 
 public:
     static WebIDL::ExceptionOr<JS::NonnullGCPtr<DOMRectReadOnly>> construct_impl(JS::Realm&, double x = 0, double y = 0, double width = 0, double height = 0);