Add a simple one shot and repeating timer API for Mojo.js.

gin/test/gtest.cc

 // 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.
 
 #include "gin/test/gtest.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "gin/arguments.h"
 #include "gin/converter.h"
@@ skipping 25 matching lines @@
                  const std::string& description) {
   EXPECT_TRUE(expected->StrictEquals(actual)) << description;
 }
 
 WrapperInfo g_wrapper_info = { kEmbedderNativeGin };
 
 }  // namespace
 
 const char GTest::kModuleName[] = "gtest";
 
-v8::Local<v8::ObjectTemplate> GTest::GetTemplate(v8::Isolate* isolate) {
+v8::Local<v8::Value> GTest::GetModule(v8::Isolate* isolate) {
   PerIsolateData* data = PerIsolateData::From(isolate);
   v8::Local<v8::ObjectTemplate> templ =
       data->GetObjectTemplate(&g_wrapper_info);
   if (templ.IsEmpty()) {
     templ = ObjectTemplateBuilder(isolate)
         .SetMethod("fail", Fail)
         .SetMethod("expectTrue", ExpectTrue)
         .SetMethod("expectFalse", ExpectFalse)
         .SetMethod("expectEqual", ExpectEqual)
         .Build();
     data->SetObjectTemplate(&g_wrapper_info, templ);
   }
-  return templ;
+  return templ->NewInstance();
 }
 
 }  // namespace gin