AK: Remove StringBuilder::build() in favor of to_deprecated_string()

Having an alias function that only wraps another one is silly, and
keeping the more obvious name should flush out more uses of deprecated
strings.
No behavior change.

Userland/Libraries/LibWeb/DOM/DOMTokenList.cpp

@@ -229,7 +229,7 @@ DeprecatedString DOMTokenList::value() const
 {
     StringBuilder builder;
     builder.join(' ', m_token_set);
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 // https://dom.spec.whatwg.org/#ref-for-concept-element-attributes-set-value%E2%91%A2

Userland/Libraries/LibWeb/DOM/Document.cpp

@@ -386,7 +386,7 @@ WebIDL::ExceptionOr<void> Document::write(Vector<DeprecatedString> const& string
     StringBuilder builder;
     builder.join(""sv, strings);
 
-    return run_the_document_write_steps(builder.build());
+    return run_the_document_write_steps(builder.to_deprecated_string());
 }
 
 // https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-document-writeln
@@ -396,7 +396,7 @@ WebIDL::ExceptionOr<void> Document::writeln(Vector<DeprecatedString> const& stri
     builder.join(""sv, strings);
     builder.append("\n"sv);
 
-    return run_the_document_write_steps(builder.build());
+    return run_the_document_write_steps(builder.to_deprecated_string());
 }
 
 // https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#document-write-steps

Userland/Libraries/LibWeb/DOM/Node.cpp

@@ -270,7 +270,7 @@ DeprecatedString Node::child_text_content() const
         if (is<Text>(child))
             builder.append(verify_cast<Text>(child).text_content());
     });
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 // https://dom.spec.whatwg.org/#concept-tree-root

Userland/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Headers.cpp

@@ -147,7 +147,7 @@ ErrorOr<Optional<Vector<DeprecatedString>>> get_decode_and_split_header_value(Re
         }
 
         // 3. Remove all HTTP tab or space from the start and end of temporaryValue.
-        auto temporary_value = temporary_value_builder.build().trim(HTTP_TAB_OR_SPACE, TrimMode::Both);
+        auto temporary_value = temporary_value_builder.to_deprecated_string().trim(HTTP_TAB_OR_SPACE, TrimMode::Both);
 
         // 4. Append temporaryValue to values.
         values.append(move(temporary_value));

Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.cpp

@@ -420,7 +420,7 @@ CanvasRenderingContext2D::PreparedText CanvasRenderingContext2D::prepare_text(De
     for (auto c : text) {
         builder.append(Infra::is_ascii_whitespace(c) ? ' ' : c);
     }
-    DeprecatedString replaced_text = builder.build();
+    auto replaced_text = builder.to_deprecated_string();
 
     // 3. Let font be the current font of target, as given by that object's font attribute.
     // FIXME: Once we have CanvasTextDrawingStyles, implement font selection.

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

@@ -2816,7 +2816,7 @@ void HTMLTokenizer::insert_input_at_insertion_point(DeprecatedString const& inpu
     builder.append(m_decoded_input.substring(0, m_insertion_point.position));
     builder.append(input);
     builder.append(m_decoded_input.substring(m_insertion_point.position));
-    m_decoded_input = builder.build();
+    m_decoded_input = builder.to_deprecated_string();
 
     m_utf8_view = Utf8View(m_decoded_input);
     m_utf8_iterator = m_utf8_view.iterator_at_byte_offset(utf8_iterator_byte_offset);

Userland/Libraries/LibWeb/WebAssembly/WebAssemblyObject.cpp

@@ -284,7 +284,7 @@ JS::ThrowCompletionOr<size_t> WebAssemblyObject::instantiate_module(JS::VM& vm,
         StringBuilder builder;
         builder.append("LinkError: Missing "sv);
         builder.join(' ', link_result.error().missing_imports);
-        return vm.throw_completion<JS::TypeError>(builder.build());
+        return vm.throw_completion<JS::TypeError>(builder.to_deprecated_string());
     }
 
     auto instance_result = s_abstract_machine.instantiate(module, link_result.release_value());