Correct 'string literal' to 'primitive strings'

mojo/public/js/codec.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 define("mojo/public/js/codec", [
   "mojo/public/js/unicode",
   "mojo/public/js/buffer",
 ], function(unicode, buffer) {
 
   var kErrorUnsigned = "Passing negative value to unsigned";
@@ skipping 353 matching lines @@
     var encoder = this.createAndEncodeEncoder(encodedSize);
     encoder.encodeArray(cls, val, numberOfElements, encodedSize);
   };
 
   Encoder.prototype.encodeStringPointer = function(val) {
     if (val == null) {
       // Also handles undefined, since undefined == null.
       this.encodePointer(val);
       return;
     }
-    // This only accepts string literals, not objects like new String("foo").
+    // Only accepts string primivites, not String Objects like new String("foo")
     if (typeof(val) !== "string") {
       throw new Error(kErrorString);
     }
     var encodedSize = kArrayHeaderSize + unicode.utf8Length(val);
     var encoder = this.createAndEncodeEncoder(encodedSize);
     encoder.encodeString(val);
   };
 
   Encoder.prototype.encodeMap = function(keyClass, valueClass, val) {
     var keys = new Array(val.size);
@@ skipping 434 matching lines @@
   exports.NullablePointerTo = NullablePointerTo;
   exports.ArrayOf = ArrayOf;
   exports.NullableArrayOf = NullableArrayOf;
   exports.PackedBool = PackedBool;
   exports.Handle = Handle;
   exports.NullableHandle = NullableHandle;
   exports.MapOf = MapOf;
   exports.NullableMapOf = NullableMapOf;
   return exports;
 });