[ash-md] Added a delay between system menu default/detailed view transitions.

base/test/scoped_mock_message_loop_task_runner_wrapper.cc

+// Copyright 2015 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 "base/test/scoped_mock_message_loop_task_runner_wrapper.h"
+
+#include <deque>
+
+#include "base/logging.h"
+#include "base/message_loop/message_loop.h"
+#include "base/test/test_mock_time_task_runner.h"
+#include "base/test/test_pending_task.h"
+#include "base/threading/thread_task_runner_handle.h"
+
+namespace base {
+
+ScopedMockMessageLoopTaskRunnerWrapper::ScopedMockMessageLoopTaskRunnerWrapper()
+    : task_runner_(new TestMockTimeTaskRunner),
+      previous_task_runner_(ThreadTaskRunnerHandle::Get()) {
+  DCHECK(MessageLoop::current());
+  MessageLoop::current()->SetTaskRunner(task_runner_);

[gab, 2016/11/17 19:35:54]

One more thing, add this above this line:

RunLoop().RunUntilIdle();

to ensure that we process any initialization tasks posted to the MessageLoop by
the fixture before replacing its TaskRunner.

(and #include run_loop.h)

[bruthig, 2016/11/17 23:57:08]

Done.

+}
+
+ScopedMockMessageLoopTaskRunnerWrapper::
+    ~ScopedMockMessageLoopTaskRunnerWrapper() {
+  DCHECK(previous_task_runner_->RunsTasksOnCurrentThread());
+  DCHECK_EQ(task_runner_, ThreadTaskRunnerHandle::Get());
+  std::deque<TestPendingTask> tasks = task_runner_->TakePendingTasks();
+  for (auto it = tasks.begin(); it != tasks.end(); ++it)
+    previous_task_runner_->PostDelayedTask(it->location, it->task, it->delay);
+  MessageLoop::current()->SetTaskRunner(std::move(previous_task_runner_));
+}
+
+}  // namespace base