Handles users rotating screen too early

ash/rotator/test/screen_rotation_animator_test_api.h

Index: ash/rotator/test/screen_rotation_animator_test_api.h
diff --git a/ash/rotator/test/screen_rotation_animator_test_api.h b/ash/rotator/test/screen_rotation_animator_test_api.h
new file mode 100644
index 0000000000000000000000000000000000000000..e75be794ee7d4bbbd9dc24e2984d43ac9424a399
--- /dev/null
+++ b/ash/rotator/test/screen_rotation_animator_test_api.h
@@ -0,0 +1,49 @@
+// Copyright 2017 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 ASH_ROTATOR_TEST_SCREEN_ROTATION_ANIMATOR_TEST_API_H_
+#define ASH_ROTATOR_TEST_SCREEN_ROTATION_ANIMATOR_TEST_API_H_
+
+#include <stdint.h>
+
+#include "base/macros.h"
+#include "ui/compositor/test/multi_layer_animator_test_controller.h"
+#include "ui/compositor/test/multi_layer_animator_test_controller_delegate.h"
+
+namespace ui {
+class Layer;
+}
+
+namespace ash {
+class ScreenRotationAnimator;
+
+namespace test {
+
+// Test API to provide internal access to a ScreenRotationAnimator instance.
+// This can also be used to control the screen rotation animations via the
+// ui::test::MultiLayerAnimatorTestController API.
+class ScreenRotationAnimatorTestApi
+    : public ui::test::MultiLayerAnimatorTestController,
+      public ui::test::MultiLayerAnimatorTestControllerDelegate {
+ public:
+  explicit ScreenRotationAnimatorTestApi(ScreenRotationAnimator* animator);
+  ~ScreenRotationAnimatorTestApi() override;
+
+  // Wrapper functions for ScreenRotationAnimator.
+  ui::Layer* GetOldLayerTreeRootLayer();
+  void DisableAnimationTimers();
+
+ private:
+  // MultiLayerAnimatorTestControllerDelegate:
+  std::vector<ui::LayerAnimator*> GetLayerAnimators() override;
+
+  ScreenRotationAnimator* animator_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScreenRotationAnimatorTestApi);
+};
+
+}  // namespace test
+}  // namespace ash
+
+#endif  // ASH_ROTATOR_TEST_SCREEN_ROTATION_ANIMATOR_TEST_API_H_