LibWeb: Make Range's boundary point comparison a public function

We'll need this in the Selection API implementation as well.

Userland/Libraries/LibWeb/DOM/Range.cpp

@@ -78,14 +78,8 @@ Node const& Range::root() const
     return m_start_container->root();
 }
 
-enum class RelativeBoundaryPointPosition {
-    Equal,
-    Before,
-    After,
-};
-
 // https://dom.spec.whatwg.org/#concept-range-bp-position
-static RelativeBoundaryPointPosition position_of_boundary_point_relative_to_other_boundary_point(Node const& node_a, u32 offset_a, Node const& node_b, u32 offset_b)
+RelativeBoundaryPointPosition position_of_boundary_point_relative_to_other_boundary_point(Node const& node_a, u32 offset_a, Node const& node_b, u32 offset_b)
 {
     // 1. Assert: nodeA and nodeB have the same root.
     VERIFY(&node_a.root() == &node_b.root());

Userland/Libraries/LibWeb/DOM/Range.h

@@ -12,6 +12,15 @@
 
 namespace Web::DOM {
 
+enum class RelativeBoundaryPointPosition {
+    Equal,
+    Before,
+    After,
+};
+
+// https://dom.spec.whatwg.org/#concept-range-bp-position
+RelativeBoundaryPointPosition position_of_boundary_point_relative_to_other_boundary_point(Node const& node_a, u32 offset_a, Node const& node_b, u32 offset_b);
+
 class Range final : public AbstractRange {
     WEB_PLATFORM_OBJECT(Range, AbstractRange);