Stub out Trusted Types interfaces (#36355)

Some methods are implemented fully, while others are implemented
partly. With these implementations, there are no observed crashes
when running the trusted-types web-platform-tests.

Most notably, the tests/wpt/tests/trusted-types/idlharness.window.js
is now fully passing.

Part of #36258

Signed-off-by: Tim van der Lippe <tvanderlippe@gmail.com>

components/script_bindings/codegen/Bindings.conf

@@ -575,6 +575,14 @@ DOMInterfaces = {
     'canGc': ['ParentNode', 'PreviousNode', 'NextNode', 'FirstChild', 'LastChild', 'PreviousSibling', 'NextSibling']
 },
 
+'TrustedTypePolicy': {
+    'canGc': ['CreateHTML', 'CreateScript', 'CreateScriptURL']
+},
+
+'TrustedTypePolicyFactory': {
+    'canGc': ['CreatePolicy', 'EmptyHTML', 'EmptyScript']
+},
+
 'URL': {
     'weakReferenceable': True,
     'canGc': ['Parse', 'SearchParams'],
@@ -590,7 +598,7 @@ DOMInterfaces = {
 },
 
 'Window': {
-    'canGc': ['Stop', 'Fetch', 'Scroll', 'Scroll_','ScrollBy', 'ScrollBy_', 'Stop', 'Fetch', 'Open', 'CreateImageBitmap'],
+    'canGc': ['Stop', 'Fetch', 'Scroll', 'Scroll_','ScrollBy', 'ScrollBy_', 'Stop', 'Fetch', 'Open', 'CreateImageBitmap', 'TrustedTypes'],
     'inRealms': ['Fetch', 'GetOpener'],
     'additionalTraits': ['crate::interfaces::WindowHelpers'],
 },
@@ -602,7 +610,7 @@ DOMInterfaces = {
 
 'WorkerGlobalScope': {
     'inRealms': ['Fetch'],
-    'canGc': ['Fetch', 'CreateImageBitmap', 'ImportScripts'],
+    'canGc': ['Fetch', 'CreateImageBitmap', 'ImportScripts', 'TrustedTypes'],
 },
 
 'Worklet': {

components/script_bindings/webidls/TrustedHTML.webidl

@@ -0,0 +1,13 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+/*
+ * The origin of this IDL file is
+ * https://www.w3.org/TR/trusted-types/#trusted-html
+ */
+
+[Exposed=(Window,Worker), Pref="dom_trusted_types_enabled"]
+interface TrustedHTML {
+  stringifier;
+  DOMString toJSON();
+};

components/script_bindings/webidls/TrustedScript.webidl

@@ -0,0 +1,13 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+/*
+ * The origin of this IDL file is
+ * https://www.w3.org/TR/trusted-types/#trusted-script
+ */
+
+[Exposed=(Window,Worker), Pref="dom_trusted_types_enabled"]
+interface TrustedScript {
+  stringifier;
+  DOMString toJSON();
+};

components/script_bindings/webidls/TrustedScriptURL.webidl

@@ -0,0 +1,13 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+/*
+ * The origin of this IDL file is
+ * https://www.w3.org/TR/trusted-types/#trused-script-url
+ */
+
+[Exposed=(Window,Worker), Pref="dom_trusted_types_enabled"]
+interface TrustedScriptURL {
+  stringifier;
+  DOMString toJSON();
+};

components/script_bindings/webidls/TrustedTypePolicy.webidl

@@ -0,0 +1,15 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+/*
+ * The origin of this IDL file is
+ * https://www.w3.org/TR/trusted-types/#trusted-type-policy
+ */
+
+[Exposed=(Window,Worker), Pref="dom_trusted_types_enabled"]
+interface TrustedTypePolicy {
+  readonly attribute DOMString name;
+  TrustedHTML createHTML(DOMString input, any... arguments);
+  TrustedScript createScript(DOMString input, any... arguments);
+  TrustedScriptURL createScriptURL(DOMString input, any... arguments);
+};

components/script_bindings/webidls/TrustedTypePolicyFactory.webidl

@@ -0,0 +1,38 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+/*
+ * The origin of this IDL file is
+ * https://www.w3.org/TR/trusted-types/#trusted-type-policy-factory
+ */
+
+[Exposed=(Window,Worker), Pref="dom_trusted_types_enabled"]
+interface TrustedTypePolicyFactory {
+    [Throws]
+    TrustedTypePolicy createPolicy(
+        DOMString policyName, optional TrustedTypePolicyOptions policyOptions = {});
+    boolean isHTML(any value);
+    boolean isScript(any value);
+    boolean isScriptURL(any value);
+    readonly attribute TrustedHTML emptyHTML;
+    readonly attribute TrustedScript emptyScript;
+    DOMString? getAttributeType(
+        DOMString tagName,
+        DOMString attribute,
+        optional DOMString? elementNs = "",
+        optional DOMString? attrNs = "");
+    DOMString? getPropertyType(
+        DOMString tagName,
+        DOMString property,
+        optional DOMString? elementNs = "");
+    readonly attribute TrustedTypePolicy? defaultPolicy;
+};
+
+dictionary TrustedTypePolicyOptions {
+   CreateHTMLCallback createHTML;
+   CreateScriptCallback createScript;
+   CreateScriptURLCallback createScriptURL;
+};
+callback CreateHTMLCallback = DOMString? (DOMString input, any... arguments);
+callback CreateScriptCallback = DOMString? (DOMString input, any... arguments);
+callback CreateScriptURLCallback = USVString? (DOMString input, any... arguments);

components/script_bindings/webidls/WindowOrWorkerGlobalScope.webidl

@@ -45,5 +45,10 @@ partial interface mixin WindowOrWorkerGlobalScope {
   readonly attribute boolean isSecureContext;
 };
 
+// https://www.w3.org/TR/trusted-types/#extensions-to-the-windoworworkerglobalscope-interface
+partial interface mixin WindowOrWorkerGlobalScope {
+  readonly attribute TrustedTypePolicyFactory trustedTypes;
+};
+
 Window includes WindowOrWorkerGlobalScope;
 WorkerGlobalScope includes WindowOrWorkerGlobalScope;