Adds constants and runner for animations

services/view_manager/animation_runner_observer.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 SERVICES_VIEW_MANAGER_ANIMATION_RUNNER_OBSERVER_H_
+#define SERVICES_VIEW_MANAGER_ANIMATION_RUNNER_OBSERVER_H_
+
+namespace mojo {
+namespace service {
+
+class ServerView;
+
+class AnimationRunnerObserver {
+ public:
+  virtual void OnAnimationScheduled(const ServerView* view, uint32_t id) = 0;
+  virtual void OnAnimationDone(const ServerView* view, uint32_t id) = 0;
+  virtual void OnAnimationInterrupted(const ServerView* view, uint32_t id) = 0;
+  virtual void OnAnimationCanceled(const ServerView* view, uint32_t id) = 0;
+
+ protected:
+  virtual ~AnimationRunnerObserver() {}
+};
+
+}  // namespace service
+}  // namespace mojo
+
+#endif  // SERVICES_VIEW_MANAGER_ANIMATION_RUNNER_OBSERVER_H_