It is time.

ui/compositor/test/draw_waiter_for_test.h

-// Copyright 2014 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.
-
-#ifndef UI_COMPOSITOR_TEST_DRAW_WAITER_H_
-#define UI_COMPOSITOR_TEST_DRAW_WAITER_H_
-
-#include "base/run_loop.h"
-#include "ui/compositor/compositor_observer.h"
-
-class Compositor;
-
-namespace ui {
-
-// This is only to be used for test. It allows execution of other tasks on
-// the current message loop before the current task finishs (there is a
-// potential for re-entrancy).
-class DrawWaiterForTest : public CompositorObserver {
- public:
-  // 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 Wait(Compositor* compositor);
-
-  // Waits for a commit instead of a draw.
-  static void WaitForCommit(Compositor* compositor);
-
- private:
-  DrawWaiterForTest();
-  ~DrawWaiterForTest() override;
-
-  void WaitImpl(Compositor* compositor);
-
-  // CompositorObserver implementation.
-  void OnCompositingDidCommit(Compositor* compositor) override;
-  void OnCompositingStarted(Compositor* compositor,
-                            base::TimeTicks start_time) override;
-  void OnCompositingEnded(Compositor* compositor) override;
-  void OnCompositingAborted(Compositor* compositor) override;
-  void OnCompositingLockStateChanged(Compositor* compositor) override;
-
-  scoped_ptr<base::RunLoop> wait_run_loop_;
-
-  bool wait_for_commit_;
-
-  DISALLOW_COPY_AND_ASSIGN(DrawWaiterForTest);
-};
-
-}  // namespace ui
-
-#endif  // UI_COMPOSITOR_TEST_DRAW_WAITER_H_