LibWeb: Make Document::run_the_document_write_steps take a StringView

Which flows on down into HTMLTokenizer::insert_input_at_insertion_point.

Userland/Libraries/LibWeb/DOM/Document.cpp

@@ -415,7 +415,7 @@ WebIDL::ExceptionOr<void> Document::write(Vector<DeprecatedString> const& string
     StringBuilder builder;
     builder.join(""sv, strings);
 
-    return run_the_document_write_steps(builder.to_deprecated_string());
+    return run_the_document_write_steps(builder.string_view());
 }
 
 // https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-document-writeln
@@ -425,11 +425,11 @@ WebIDL::ExceptionOr<void> Document::writeln(Vector<DeprecatedString> const& stri
     builder.join(""sv, strings);
     builder.append("\n"sv);
 
-    return run_the_document_write_steps(builder.to_deprecated_string());
+    return run_the_document_write_steps(builder.string_view());
 }
 
 // https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#document-write-steps
-WebIDL::ExceptionOr<void> Document::run_the_document_write_steps(DeprecatedString input)
+WebIDL::ExceptionOr<void> Document::run_the_document_write_steps(StringView input)
 {
     // 1. If document is an XML document, then throw an "InvalidStateError" DOMException.
     if (m_type == Type::XML)

Userland/Libraries/LibWeb/DOM/Document.h

@@ -546,7 +546,7 @@ private:
 
     void evaluate_media_rules();
 
-    WebIDL::ExceptionOr<void> run_the_document_write_steps(DeprecatedString);
+    WebIDL::ExceptionOr<void> run_the_document_write_steps(StringView);
 
     void queue_intersection_observer_task();
     void queue_an_intersection_observer_entry(IntersectionObserver::IntersectionObserver&, HighResolutionTime::DOMHighResTimeStamp time, JS::NonnullGCPtr<Geometry::DOMRectReadOnly> root_bounds, JS::NonnullGCPtr<Geometry::DOMRectReadOnly> bounding_client_rect, JS::NonnullGCPtr<Geometry::DOMRectReadOnly> intersection_rect, bool is_intersecting, double intersection_ratio, JS::NonnullGCPtr<Element> target);

Userland/Libraries/LibWeb/HTML/Parser/HTMLTokenizer.cpp

@@ -2799,7 +2799,7 @@ HTMLTokenizer::HTMLTokenizer(StringView input, DeprecatedString const& encoding)
     m_source_positions.empend(0u, 0u);
 }
 
-void HTMLTokenizer::insert_input_at_insertion_point(DeprecatedString const& input)
+void HTMLTokenizer::insert_input_at_insertion_point(StringView input)
 {
     auto utf8_iterator_byte_offset = m_utf8_view.byte_offset_of(m_utf8_iterator);
 

Userland/Libraries/LibWeb/HTML/Parser/HTMLTokenizer.h

@@ -126,7 +126,7 @@ public:
 
     DeprecatedString source() const { return m_decoded_input; }
 
-    void insert_input_at_insertion_point(DeprecatedString const& input);
+    void insert_input_at_insertion_point(StringView input);
     void insert_eof();
     bool is_eof_inserted();