deps/v8/src/js/string.js
function StringSearch(pattern) {
  CHECK_OBJECT_COERCIBLE(this, "String.prototype.search");

  if (!IS_NULL_OR_UNDEFINED(pattern)) {
    var searcher = pattern[searchSymbol];
    if (!IS_UNDEFINED(searcher)) {
      return %_Call(searcher, pattern, this);
    }
  }

  var subject = TO_STRING(this);

  // Equivalent to RegExpCreate (ES#sec-regexpcreate)
  var regexp = %_NewObject(GlobalRegExp, GlobalRegExp);
  RegExpInitialize(regexp, pattern);
  return %_Call(regexp[searchSymbol], regexp, subject);
}
function StringSearch(pattern) {
  CHECK_OBJECT_COERCIBLE(this, "String.prototype.search");

  if (!IS_NULL_OR_UNDEFINED(pattern)) {
    var searcher = pattern[searchSymbol];
    if (!IS_UNDEFINED(searcher)) {
      return %_Call(searcher, pattern, this);
    }
  }

  var subject = TO_STRING(this);

  // Equivalent to RegExpCreate (ES#sec-regexpcreate)
  var regexp = %_NewObject(GlobalRegExp, GlobalRegExp);
  RegExpInitialize(regexp, pattern);
  return %_Call(regexp[searchSymbol], regexp, subject);
}
ES6 21.1.3.15.