Revert of Make ui::Compositor use ui::Scheduler

ui/compositor/test/draw_waiter_for_test.h

Index: ui/compositor/test/draw_waiter_for_test.h
diff --git a/ui/compositor/test/draw_waiter_for_test.h b/ui/compositor/test/draw_waiter_for_test.h
index adae9178cb4d9555f44374fbd2b6bb6024ca6feb..55ca2fff0543d9edffb998c1dc496390a626ca8e 100644
--- a/ui/compositor/test/draw_waiter_for_test.h
+++ b/ui/compositor/test/draw_waiter_for_test.h
@@ -20,22 +20,13 @@
   // Waits for a draw to be issued by the compositor. If the test times out
   // here, there may be a logic error in the compositor code causing it
   // not to draw.
-  static void WaitForCompositingStarted(Compositor* compositor);
-
-  // Waits for a swap to be completed from the compositor.
-  static void WaitForCompositingEnded(Compositor* compositor);
+  static void Wait(Compositor* compositor);
 
   // Waits for a commit instead of a draw.
   static void WaitForCommit(Compositor* compositor);
 
  private:
-  enum WaitEvent {
-    WAIT_FOR_COMMIT,
-    WAIT_FOR_COMPOSITING_STARTED,
-    WAIT_FOR_COMPOSITING_ENDED,
-  };
-
-  DrawWaiterForTest(WaitEvent wait_event);
+  DrawWaiterForTest();
   ~DrawWaiterForTest() override;
 
   void WaitImpl(Compositor* compositor);
@@ -50,7 +41,7 @@
 
   scoped_ptr<base::RunLoop> wait_run_loop_;
 
-  WaitEvent wait_event_;
+  bool wait_for_commit_;
 
   DISALLOW_COPY_AND_ASSIGN(DrawWaiterForTest);
 };