Mojo: Add the ability to hook up a channel to the embedder API.

mojo/system/test_utils.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 "mojo/system/test_utils.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/synchronization/waitable_event.h"
 
@@ skipping 13 matching lines @@
 
 void PostTaskAndWait(scoped_refptr<base::TaskRunner> task_runner,
                      const tracked_objects::Location& from_here,
                      const base::Closure& task) {
   base::WaitableEvent event(false, false);
   task_runner->PostTask(from_here,
                         base::Bind(&PostTaskAndWaitHelper, &event, task));
   event.Wait();
 }
 
+// TestWithIOThreadBase --------------------------------------------------------
+
+TestWithIOThreadBase::TestWithIOThreadBase() : io_thread_("io_thread") {
+}
+
+TestWithIOThreadBase::~TestWithIOThreadBase() {
+}
+
+void TestWithIOThreadBase::SetUp() {
+  io_thread_.StartWithOptions(
+      base::Thread::Options(base::MessageLoop::TYPE_IO, 0));
+}
+
+void TestWithIOThreadBase::TearDown() {
+  io_thread_.Stop();
+}
+
 }  // namespace test
 }  // namespace system
 }  // namespace mojo