Mojo's C++ and JavaScript bindings should produce identical messages

mojo/public/bindings/js/codec_unittests.js

 // Copyright 2013 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([
     "gtest",
     "mojo/public/bindings/js/codec",
     "mojo/public/bindings/sample/mojom/sample_service"
   ], function(gtest, codec, sample) {
   testBar();
@@ skipping 84 matching lines @@
       foo.extra_bars[i].beta = 2 * i;
       foo.extra_bars[i].gamma = 3 * i;
     }
     foo.name = "I am a banana";
     foo.files = [
       // These are supposed to be handles, but we fake them with integers.
       23423782, 32549823, 98320423, 38502383, 92834093,
     ];
 
     var messageName = 31;
-    var payloadSize = sample.Foo.encodedSize;
+    var payloadSize = 232;
 
     var builder = new codec.MessageBuilder(messageName, payloadSize);
     builder.encodeStruct(sample.Foo, foo);
 
     var message = builder.finish();
 
     var expectedMemory = [
-      /*  0: */   80,    0,    0,    0,   31,    0,    0,    0,
-      /*  8: */   72,    0,    0,    0,   10,    0,    0,    0,
+      /*  0: */  240,    0,    0,    0,   31,    0,    0,    0,
+      /*  8: */   64,    0,    0,    0,   10,    0,    0,    0,
       /* 16: */ 0xD5, 0xB4, 0x12, 0x02, 0x93, 0x6E, 0x01,    0,
       /* 24: */    5,    0,    0,    0,    0,    0,    0,    0,
-      /* 32: */   48,    0,    0,    0,    0,    0,    0,    0,
+      /* 32: */   40,    0,    0,    0,    0,    0,    0,    0,
       // TODO(abarth): Test more of the message's raw memory.
     ];
 
     equalsArray(message.memory, expectedMemory, "message.memory");
 
     var expectedHandles = [
       23423782, 32549823, 98320423, 38502383, 92834093,
     ];
 
     equalsArray(message.handles, expectedHandles, "message.handles");
@@ skipping 58 matching lines @@
       24, // 18
       24, // 19
       24, // 20
     ];
     for (var i = 0; i < aligned.length; ++i) {
       gtest.expectEqual(codec.align(i), aligned[i],
           "codec.align(" + i + ") is " + codec.align(i));
     }
   }
 });