Update mojom parser to allow array of arrays.

mojo/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([
     "gin/test/expect",
     "mojo/public/js/bindings/codec",
     "mojo/public/interfaces/bindings/tests/sample_service.mojom",
   ], function(expect, codec, sample) {
   testBar();
@@ skipping 66 matching lines @@
     for (var i = 0; i < foo.extra_bars.length; ++i) {
       foo.extra_bars[i].alpha = 1 * i;
       foo.extra_bars[i].beta = 2 * i;
       foo.extra_bars[i].gamma = 3 * i;
     }
     foo.name = "I am a banana";
     // This is supposed to be a handle, but we fake it with an integer.
     foo.source = 23423782;
 
     var messageName = 31;
-    var payloadSize = 224;
+    var payloadSize = 240;
 
     var builder = new codec.MessageBuilder(messageName, payloadSize);
     builder.encodeStruct(sample.Foo, foo);
 
     var message = builder.finish();
 
     var expectedMemory = new Uint8Array([
       /*  0: */   16,    0,    0,    0,    2,    0,    0,    0,
       /*  8: */   31,    0,    0,    0,    0,    0,    0,    0,
-      /* 16: */   72,    0,    0,    0,   12,    0,    0,    0,
+      /* 16: */   80,    0,    0,    0,   13,    0,    0,    0,
       /* 24: */ 0xD5, 0xB4, 0x12, 0x02, 0x93, 0x6E, 0x01,    0,
       /* 32: */    5,    0,    0,    0,    0,    0,    0,    0,
-      /* 40: */   48,    0,    0,    0,    0,    0,    0,    0,
+      /* 40: */   56,    0,    0,    0,    0,    0,    0,    0,
     ]);
     // TODO(abarth): Test more of the message's raw memory.
     var actualMemory = new Uint8Array(message.memory.buffer,
                                       0, expectedMemory.length);
     expect(actualMemory).toEqual(expectedMemory);
 
     var expectedHandles = [
       23423782,
     ];
 
@@ skipping 69 matching lines @@
     expect(actualMemory.length).toEqual(expectedMemory.length);
     expect(actualMemory).toEqual(expectedMemory);
 
     var reader = new codec.MessageReader(message);
     expect(reader.payloadSize).toBe(payloadSize);
     expect(reader.messageName).toBe(messageName);
     var str2 = reader.decoder.decodeStringPointer();
     expect(str2).toEqual(str);
   }
 });