Migrate StructuredSerializeOptions (#2327)

Co-authored-by: saschanaz <saschanaz@users.noreply.github.com>

Author: Bashamega

inputfiles/knownTypes.json

@@ -61,7 +61,6 @@
         "RTCStatsIceCandidatePairState",
         "RTCStatsType",
         "RTCTransportStats",
-        "Transferable",
         "ValueTypeMap",
         "VideoFacingModeEnum"
     ],
@@ -91,12 +90,10 @@
         "RsaKeyGenParams",
         "RsaOaepParams",
         "RsaPssParams",
-        "Transferable",
         "ValueTypeMap"
     ],
     "Worklet": [
         "EventListenerOrEventListenerObject",
-        "Transferable",
         "ValueTypeMap"
     ]
 }

inputfiles/overridingTypes.jsonc

@@ -3279,15 +3279,6 @@
     },
     "dictionaries": {
         "dictionary": {
-            "StructuredSerializeOptions": {
-                "members": {
-                    "member": {
-                        "transfer": {
-                            "overrideType": "Transferable[]"
-                        }
-                    }
-                }
-            },
             "MessageEventInit": {
                 "members": {
                     "member": {

inputfiles/patches/html.kdl

@@ -20,6 +20,14 @@ interface HTMLImageElement {
   property loading overrideType=#""eager" | "lazy""#
 }
 
+dictionary StructuredSerializeOptions {
+  member transfer {
+    type {
+      type Transferable
+    }
+  }
+}
+
 removals {
   dictionary CanvasRenderingContext2DSettings {
     member colorType // Blink-only as of 2025-12, being tested in WebKit

src/build/patches.ts

@@ -380,7 +380,7 @@ function handleMethodAndConstructor(
  */
 function handleDictionary(child: Node): DeepPartial<Dictionary> {
   const name = string(child.values[0]);
-  const member: Record<string, Partial<Member>> = {};
+  const member: Record<string, DeepPartial<Member>> = {};
   let typeParameters = {};
 
   for (const c of child.children) {
@@ -417,11 +417,12 @@ function handleDictionary(child: Node): DeepPartial<Dictionary> {
  * Handles dictionary member nodes
  * @param c The member node to handle.
  */
-function handleMember(c: Node): Partial<Member> {
+function handleMember(c: Node): DeepPartial<Member> {
   const name = string(c.values[0]);
+  const typeNodes = c.children.filter((c) => c.name === "type");
   return {
     name,
-    ...optionalMember("type", "string", c.properties?.type),
+    ...handleTyped(typeNodes, c.properties?.type),
     ...optionalMember("required", "boolean", c.properties?.required),
     ...optionalMember("deprecated", "string", c.properties?.deprecated),
     ...optionalMember("overrideType", "string", c.properties?.overrideType),