EDK: Add a TestIOThread::IsCurrentAndRunning().

mojo/edk/system/test/test_io_thread.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/edk/system/test/test_io_thread.h"
 
 #include "base/bind.h"
 #include "mojo/edk/util/waitable_event.h"
 
 using mojo::util::AutoResetWaitableEvent;
@@ skipping 37 matching lines @@
   io_task_runner_ = MakeRefCounted<base_edk::PlatformTaskRunnerImpl>(
       message_loop()->task_runner());
 }
 
 void TestIOThread::Stop() {
   // Note: It's okay to call |Stop()| even if the thread isn't running.
   io_thread_.Stop();
   io_thread_started_ = false;
 }
 
+bool TestIOThread::IsCurrentAndRunning() const {
+  return base::MessageLoop::current() == io_thread_.message_loop() &&
+         io_thread_.message_loop()->is_running();
+}
+
 void TestIOThread::PostTask(const base::Closure& task) {
   io_task_runner_->PostTask(task);
 }
 
 void TestIOThread::PostTaskAndWait(const base::Closure& task) {
   AutoResetWaitableEvent event;
   io_task_runner_->PostTask(base::Bind(&PostTaskAndWaitHelper, &event, task));
   event.Wait();
 }
 
 }  // namespace test
 }  // namespace system
 }  // namespace mojo