LibWeb: Elide boundary checks when constructing find in page ranges

Previously, unnecessary boundary checks were being done when
constructing the range objects used to represent find in page matches.
These checks are no longer performed leading to a significant speedup
when performing find in page queries on pages containing a lot of text.

(cherry picked from commit e76ad9492e0992f9a6d821240bea2b62f27a03c8)

Userland/Libraries/LibWeb/DOM/Document.cpp

@@ -5219,20 +5219,17 @@ Vector<JS::Handle<DOM::Range>> Document::find_matching_text(String const& query,
             for (; i < text_block.positions.size() - 1 && match_index.value() > text_block.positions[i + 1].start_offset; ++i)
                 match_start_position = &text_block.positions[i + 1];
 
-            auto range = create_range();
             auto start_position = match_index.value() - match_start_position->start_offset;
             auto& start_dom_node = match_start_position->dom_node;
-            (void)range->set_start(start_dom_node, start_position);
 
             auto* match_end_position = match_start_position;
             for (; i < text_block.positions.size() - 1 && (match_index.value() + query.bytes_as_string_view().length() > text_block.positions[i + 1].start_offset); ++i)
                 match_end_position = &text_block.positions[i + 1];
 
             auto& end_dom_node = match_end_position->dom_node;
             auto end_position = match_index.value() + query.bytes_as_string_view().length() - match_end_position->start_offset;
-            (void)range->set_end(end_dom_node, end_position);
 
-            matches.append(range);
+            matches.append(Range::create(start_dom_node, start_position, end_dom_node, end_position));
             match_start_position = match_end_position;
             offset = match_index.value() + query.bytes_as_string_view().length() + 1;
             if (offset >= text.bytes_as_string_view().length())