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

base/test/test_mock_time_task_runner.h

Index: base/test/test_mock_time_task_runner.h
diff --git a/base/test/test_mock_time_task_runner.h b/base/test/test_mock_time_task_runner.h
index 624f739cfa55604089e39858919ccaf117bb5701..b0ddb1c0fe4d8d9562d2e93accf24926f4b72e34 100644
--- a/base/test/test_mock_time_task_runner.h
+++ b/base/test/test_mock_time_task_runner.h
@@ -7,6 +7,7 @@
 
 #include <stddef.h>
 
+#include <deque>
 #include <memory>
 #include <queue>
 #include <vector>
@@ -83,6 +84,7 @@ class TestMockTimeTaskRunner : public SingleThreadTaskRunner {
   // source. The returned TickClock will hold a reference to |this|.
   std::unique_ptr<TickClock> GetMockTickClock() const;
 
+  std::deque<TestPendingTask> TakePendingTasks();
   bool HasPendingTask() const;
   size_t GetPendingTaskCount() const;
   TimeDelta NextPendingTaskDelay() const;
@@ -165,6 +167,23 @@ class TestMockTimeTaskRunner : public SingleThreadTaskRunner {
   DISALLOW_COPY_AND_ASSIGN(TestMockTimeTaskRunner);
 };
 
+// A scoped wrapper around TestMockTimeTaskRunner that replaces message loop's
+// task runner with a TestMockTimeTaskRunner and resets it back at the end of
+// the scope.
+class ScopedMockTaskRunnerWrapper {

[danakj, 2016/11/15 21:56:37]

This moved to another file right? Why's it here too?

[bruthig, 2016/11/15 22:00:52]

Just to make sure my reviewers are on the ball. Kudos, you passed! :P

+ public:
+  ScopedMockTaskRunnerWrapper();
+  virtual ~ScopedMockTaskRunnerWrapper();
+
+  base::TestMockTimeTaskRunner* task_runner() { return task_runner_.get(); }
+
+ private:
+  scoped_refptr<base::TestMockTimeTaskRunner> task_runner_;
+  scoped_refptr<base::SingleThreadTaskRunner> previous_task_runner_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedMockTaskRunnerWrapper);
+};
+
 }  // namespace base
 
 #endif  // BASE_TEST_TEST_MOCK_TIME_TASK_RUNNER_H_