LibWeb: Modify DomParser parseFromString to accept TrustedHTML

We made the internal changes to accept this new type, but we forgot to
expose it.

Author: tete17

Libraries/LibWeb/HTML/DOMParser.cpp

@@ -39,7 +39,7 @@ void DOMParser::initialize(JS::Realm& realm)
 }
 
 // https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-domparser-parsefromstring
-WebIDL::ExceptionOr<GC::Root<DOM::Document>> DOMParser::parse_from_string(Utf16String string, Bindings::DOMParserSupportedType type)
+WebIDL::ExceptionOr<GC::Root<DOM::Document>> DOMParser::parse_from_string(TrustedTypes::TrustedHTMLOrString string, Bindings::DOMParserSupportedType type)
 {
     // 1. Let compliantString to the result of invoking the Get Trusted Type compliant string algorithm with
     //    TrustedHTML, this's relevant global object, string, "DOMParser parseFromString", and "script".

Libraries/LibWeb/HTML/DOMParser.h

@@ -24,7 +24,7 @@ class DOMParser final : public Bindings::PlatformObject {
 
     virtual ~DOMParser() override;
 
-    WebIDL::ExceptionOr<GC::Root<DOM::Document>> parse_from_string(Utf16String, Bindings::DOMParserSupportedType type);
+    WebIDL::ExceptionOr<GC::Root<DOM::Document>> parse_from_string(TrustedTypes::TrustedHTMLOrString, Bindings::DOMParserSupportedType type);
 
 private:
     explicit DOMParser(JS::Realm&);

Libraries/LibWeb/HTML/DOMParser.idl

@@ -1,4 +1,5 @@
 #import <DOM/Document.idl>
+#import <TrustedTypes/TrustedHTML.idl>
 
 enum DOMParserSupportedType {
     "text/html",
@@ -13,5 +14,5 @@ enum DOMParserSupportedType {
 interface DOMParser {
     constructor();
 
-    Document parseFromString(Utf16DOMString string, DOMParserSupportedType type);
+    Document parseFromString((TrustedHTML or Utf16DOMString) string, DOMParserSupportedType type);
 };

Tests/LibWeb/Text/expected/wpt-import/trusted-types/block-string-assignment-to-DOMParser-parseFromString.txt

@@ -2,9 +2,8 @@ Harness status: OK
 
 Found 5 tests
 
-4 Pass
-1 Fail
-Fail	document.innerText assigned via policy (successful HTML transformation).
+5 Pass
+Pass	document.innerText assigned via policy (successful HTML transformation).
 Pass	`document.innerText = string` throws.
 Pass	'document.innerText = null' throws
 Pass	'document.innerText = string' assigned via default policy (successful HTML transformation).

Tests/LibWeb/Text/expected/wpt-import/trusted-types/policy-without-return-value.sub.txt

@@ -2,9 +2,8 @@ Harness status: OK
 
 Found 4 tests
 
-3 Pass
-1 Fail
-Fail	createHTML with a policy that returns undefined DOMParser
+4 Pass
+Pass	createHTML with a policy that returns undefined DOMParser
 Pass	createHTML with a policy that returns undefined iframe.srcdoc
 Pass	createScript with a policy that returns undefined <div onload>
 Pass	createScriptURL with a policy that returns undefined script.src