Mojo javascript encoder: Empty string encoded as NULL.

mojo/public/js/bindings/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/bindings/codec", [
   "mojo/public/js/bindings/unicode",
   "mojo/public/js/bindings/buffer"
   ], function(unicode, buffer) {
 
   var kErrorUnsigned = "Passing negative value to unsigned";
@@ skipping 298 matching lines @@
       for (var i = 0; i < numberOfElements; ++i)
         cls.encode(this, val[i]);
     }
   };
 
   Encoder.prototype.encodeStruct = function(cls, val) {
     return cls.encode(this, val);
   };
 
   Encoder.prototype.encodeStructPointer = function(cls, val) {
-    if (!val) {
+    if (val == null) {
+      // Also handles undefined, since undefined == null.
       this.encodePointer(val);
       return;
     }
     var encoder = this.createAndEncodeEncoder(cls.encodedSize);
     cls.encode(encoder, val);
   };
 
   Encoder.prototype.encodeArrayPointer = function(cls, val) {
-    if (!val) {
+    if (val == null) {
+      // Also handles undefined, since undefined == null.
       this.encodePointer(val);
       return;
     }
     var numberOfElements = val.length;
     var encodedSize = kArrayHeaderSize + ((cls === PackedBool) ?
         Math.ceil(numberOfElements / 8) : cls.encodedSize * numberOfElements);
     var encoder = this.createAndEncodeEncoder(encodedSize);
     encoder.encodeArray(cls, val, numberOfElements, encodedSize);
   };
 
   Encoder.prototype.encodeStringPointer = function(val) {
-    if (!val) {
+    if (val == null) {
+      // Also handles undefined, since undefined == null.
       this.encodePointer(val);
       return;
     }
     var encodedSize = kArrayHeaderSize + unicode.utf8Length(val);
     var encoder = this.createAndEncodeEncoder(encodedSize);
     encoder.encodeString(val);
   };
 
   // Message ------------------------------------------------------------------
 
@@ skipping 376 matching lines @@
   exports.NullableString = NullableString;
   exports.PointerTo = PointerTo;
   exports.NullablePointerTo = NullablePointerTo;
   exports.ArrayOf = ArrayOf;
   exports.NullableArrayOf = NullableArrayOf;
   exports.PackedBool = PackedBool;
   exports.Handle = Handle;
   exports.NullableHandle = NullableHandle;
   return exports;
 });