fix(webgpu): add webidl records and simple unions (denoland#9698)

The only functional user facing difference is that this commit allows the
use SPIRV shaders, not just WGSL. This matches FF and Chrome Canary.

op_crates/web/00_webidl.js

@@ -596,6 +596,13 @@
 
  converters.VoidFunction = convertCallbackFunction;
 
+ converters["UVString?"] = createNullableConverter(
+ converters.USVString,
+ );
+ converters["sequence<double>"] = createSequenceConverter(
+ converters["double"],
+ );
+
  function requiredArguments(length, required, opts = {}) {
  if (length < required) {
  const errMsg = `${
@@ -737,6 +744,26 @@
  };
  }
 
+ function createRecordConverter(keyConverter, valueConverter) {
+ return (V, opts) => {
+ if (typeof V !== "object") {
+ throw makeException(
+ TypeError,
+ "can not be converted to dictionary.",
+ opts,
+ );
+ }
+ const result = {};
+ for (const key of V) {
+ const typedKey = keyConverter(key, opts);
+ const value = V[key];
+ const typedValue = valueConverter(value, opts);
+ result[typedKey] = typedValue;
+ }
+ return result;
+ };
+ }
+
  const brand = Symbol("[[webidl.brand]]");
 
  function createInterfaceConverter(name, prototype) {
@@ -766,12 +793,14 @@
 
  window.__bootstrap ??= {};
  window.__bootstrap.webidl = {
+ makeException,
  converters,
  requiredArguments,
  createDictionaryConverter,
  createEnumConverter,
  createNullableConverter,
  createSequenceConverter,
+ createRecordConverter,
  createInterfaceConverter,
  brand,
  createBranded,

op_crates/web/internal.d.ts

@@ -25,6 +25,11 @@ declare namespace globalThis {
  */
  context: string;
  }
+ declare function makeException(
+ ErrorType: any,
+ message: string,
+ opts: ValueConverterOpts,
+ ): any;
  declare interface IntConverterOpts extends ValueConverterOpts {
  /**
  * Wether to throw if the number is outside of the acceptable values for
@@ -191,6 +196,8 @@ declare namespace globalThis {
  * Convert a value into a `VoidFunction` (() => void).
  */
  VoidFunction(v: any, opts?: ValueConverterOpts): () => void;
+ ["UVString?"](v: any, opts?: ValueConverterOpts): string | null;
+ ["sequence<double>"](v: any, opts?: ValueConverterOpts): number[];
 
  [type: string]: (v: any, opts: ValueConverterOpts) => any;
  };
@@ -268,6 +275,17 @@ declare namespace globalThis {
  name: string,
  prototype: any,
  ): (v: any, opts: ValueConverterOpts) => any;
+
+ declare function createRecordConverter<
+ K extends string | number | symbol,
+ V,
+ >(
+ keyConverter: (v: any, opts: ValueConverterOpts) => K,
+ valueConverter: (v: any, opts: ValueConverterOpts) => V,
+ ): (
+ v: Record<K, V>,
+ opts: ValueConverterOpts,
+ ) => any;
  }
 
  declare var eventTarget: {