compositor: Tick the UI animations from cc, instead of from timer callbacks.

ui/compositor/test/layer_animator_collection_test_controller.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_LAYER_ANIMATOR_COLLECTION_TEST_CONTROLLER_H_
+#define UI_COMPOSITOR_TEST_LAYER_ANIMATOR_COLLECTION_TEST_CONTROLLER_H_
+
+#include "ui/compositor/layer_animator_collection.h"
+
+namespace ui {
+
+// Allows tests to access the animators in the collection.
+class LayerAnimatorCollectionTestController {
+ public:
+  explicit LayerAnimatorCollectionTestController(
+      LayerAnimatorCollection* collection);
+  ~LayerAnimatorCollectionTestController();
+
+  void StopAllAnimators();
+
+ private:
+  LayerAnimatorCollection* collection_;
+
+  DISALLOW_COPY_AND_ASSIGN(LayerAnimatorCollectionTestController);
+};
+
+}  // namespace ui
+
+#endif  // UI_COMPOSITOR_TEST_LAYER_ANIMATOR_COLLECTION_TEST_CONTROLLER_H_