lib: fix sequence argument handling in Blob constructor

This uses the existing WebIDL infrastructure to handle the iteration
over the argument correctly according to the specification.

Note that we can't avoid looping over the input twice: we only know the
value of the 'endings' option after converting the blob parts into an
array.

PR-URL: #62179
Reviewed-By: Mattias Buelens <mattias@buelens.com>
Reviewed-By: Jason Zhang <xzha4350@gmail.com>

Author: Ms2ger

lib/internal/blob.js

@@ -1,7 +1,6 @@
 'use strict';
 
 const {
-  ArrayFrom,
   MathMax,
   MathMin,
   ObjectDefineProperties,
@@ -15,7 +14,6 @@ const {
   StringPrototypeSplit,
   StringPrototypeToLowerCase,
   Symbol,
-  SymbolIterator,
   SymbolToStringTag,
   Uint8Array,
 } = primordials;
@@ -54,12 +52,15 @@ const {
   lazyDOMException,
 } = require('internal/util');
 const { inspect } = require('internal/util/inspect');
-const { convertToInt } = require('internal/webidl');
+const {
+  converters,
+  convertToInt,
+  createSequenceConverter,
+} = require('internal/webidl');
 
 const {
   codes: {
     ERR_BUFFER_TOO_LARGE,
-    ERR_INVALID_ARG_TYPE,
     ERR_INVALID_ARG_VALUE,
     ERR_INVALID_STATE,
     ERR_INVALID_THIS,
@@ -112,7 +113,6 @@ function getSource(source, endings) {
   if (isAnyArrayBuffer(source)) {
     source = new Uint8Array(source);
   } else if (!isArrayBufferView(source)) {
-    source = `${source}`;
     if (endings === 'native')
       source = RegExpPrototypeSymbolReplace(/\n|\r\n/g, source, EOL);
     source = enc.encode(source);
@@ -126,6 +126,13 @@ function getSource(source, endings) {
   return [byteLength, new Uint8Array(slice)];
 }
 
+const sourcesConverter = createSequenceConverter((source, opts = kEmptyObject) => {
+  if (isBlob(source) || isAnyArrayBuffer(source) || isArrayBufferView(source)) {
+    return source;
+  }
+  return converters.DOMString(source, opts);
+});
+
 class Blob {
   /**
    * @typedef {string|ArrayBuffer|ArrayBufferView|Blob} SourcePart
@@ -142,11 +149,8 @@ class Blob {
   constructor(sources = [], options) {
     markTransferMode(this, true, false);
 
-    if (sources === null ||
-        typeof sources[SymbolIterator] !== 'function' ||
-