Cast: Add tests for clocks being slow/fast

media/cast/test/fake_single_thread_task_runner.h

Index: media/cast/test/fake_single_thread_task_runner.h
diff --git a/media/cast/test/fake_single_thread_task_runner.h b/media/cast/test/fake_single_thread_task_runner.h
index 710138597f43015c777c39dedd0f09e72c726697..779a897cfbbad97ef4ac8f42cfa5af549d2af701 100644
--- a/media/cast/test/fake_single_thread_task_runner.h
+++ b/media/cast/test/fake_single_thread_task_runner.h
@@ -24,6 +24,9 @@ class FakeSingleThreadTaskRunner : public base::SingleThreadTaskRunner {
 
   void RunTasks();
 
+  // Note: Advances |clock_|.
+  void Sleep(base::TimeDelta t);
+
   // base::SingleThreadTaskRunner implementation.
   virtual bool PostDelayedTask(const tracked_objects::Location& from_here,
                                const base::Closure& task,
@@ -43,6 +46,7 @@ class FakeSingleThreadTaskRunner : public base::SingleThreadTaskRunner {
  private:
   base::SimpleTestTickClock* const clock_;
   std::multimap<base::TimeTicks, PostedTask> tasks_;
+  bool fail_on_next_task_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeSingleThreadTaskRunner);
 };