Mojo JS bindings: fix the unittests.

mojo/public/js/core_unittests.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([
     "gin/test/expect",
     "mojo/public/js/core",
     "gc",
   ], function(expect, core, gc) {
 
@@ skipping 138 matching lines @@
       senderData[i] = i * i;
     }
 
     var write = core.writeData(
       pipe.producerHandle, senderData,
       core.WRITE_DATA_FLAG_ALL_OR_NONE);
 
     expect(write.result).toBe(core.RESULT_OK);
     expect(write.numBytes).toBe(42);
 
+    var wait = core.wait(pipe.consumerHandle, core.HANDLE_SIGNAL_READABLE,
+                         core.DEADLINE_INDEFINITE);
+    expect(wait.result).toBe(core.RESULT_OK);
     var peeked = core.readData(
          pipe.consumerHandle,
          core.READ_DATA_FLAG_PEEK | core.READ_DATA_FLAG_ALL_OR_NONE);
     expect(peeked.result).toBe(core.RESULT_OK);
     expect(peeked.buffer.byteLength).toBe(42);
 
     var peeked_memory = new Uint8Array(peeked.buffer);
     for (var i = 0; i < peeked_memory.length; ++i)
       expect(peeked_memory[i]).toBe((i * i) & 0xFF);
 
@@ skipping 19 matching lines @@
     expect(core.isHandle(pipe.handle1)).toBeTruthy();
     expect(core.isHandle(null)).toBeTruthy();
   }
 
   function testIsHandleDataPipe(pipe) {
     expect(core.isHandle(pipe.consumerHandle)).toBeTruthy();
     expect(core.isHandle(pipe.producerHandle)).toBeTruthy();
   }
 
 });