Thread ui opacity animations

ui/compositor/test/layer_animator_test_controller.h

+// Copyright (c) 2013 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_LAYER_ANIMATOR_TEST_CONTROLLER_H_
+#define UI_COMPOSITOR_TEST_LAYER_ANIMATOR_TEST_CONTROLLER_H_
+
+#include "ui/compositor/layer_animator.h"
+
+namespace ui {
+
+// Allows tests to access sequences owned by the animator.
+class LayerAnimatorTestController {
+ public:
+  LayerAnimatorTestController(scoped_refptr<LayerAnimator> animator);
+
+  ~LayerAnimatorTestController();
+
+  LayerAnimator* animator() { return animator_.get(); }
+
+  // Returns the running sequence animating the given property, if any.
+  LayerAnimationSequence* GetRunningSequence(
+      LayerAnimationElement::AnimatableProperty property);
+
+  // Starts threaded animations that are waiting for an effective start time.
+  void StartThreadedAnimationsIfNeeded();
+
+ private:
+  scoped_refptr<LayerAnimator> animator_;
+};
+
+}  // namespace ui
+
+#endif  // UI_COMPOSITOR_TEST_LAYER_ANIMATOR_TEST_CONTROLLER_H_