fixup! lib: short-circuit WebIDL BufferSource SAB check

Author: panva

lib/internal/webidl.js

@@ -23,7 +23,6 @@ const {
   SymbolIterator,
   TypeError,
   TypedArrayPrototypeGetBuffer,
-  TypedArrayPrototypeGetSymbolToStringTag,
 } = primordials;
 
 const {
@@ -36,6 +35,7 @@ const { kEmptyObject } = require('internal/util');
 const {
   isArrayBuffer,
   isSharedArrayBuffer,
+  isTypedArray,
 } = require('internal/util/types');
 
 const converters = { __proto__: null };
@@ -392,12 +392,8 @@ function createInterfaceConverter(name, I) {
 }
 
 // Returns the [[ViewedArrayBuffer]] of an ArrayBufferView without leaving JS.
-// `TypedArrayPrototypeGetSymbolToStringTag` returns the concrete TypedArray
-// name (e.g. 'Uint8Array') for any %TypedArray% instance, and `undefined`
-// for a DataView, so it doubles as a branch-free dispatch between the two
-// getters.
 function getViewedArrayBuffer(V) {
-  return TypedArrayPrototypeGetSymbolToStringTag(V) !== undefined ?
+  return isTypedArray(V) ?
     TypedArrayPrototypeGetBuffer(V) : DataViewPrototypeGetBuffer(V);
 }