More animation cleanup.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/5154006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@66683 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 27 insertions, 0 deletions

diff --git a/app/animation_container_observer.h b/app/animation_container_observer.h
new file mode 100644
index 0000000..9f74a91
--- /dev/null
+++ b/app/animation_container_observer.h
@@ -0,0 +1,27 @@
+// Copyright (c) 2010 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 APP_ANIMATION_CONTAINER_OBSERVER_H_
+#define APP_ANIMATION_CONTAINER_OBSERVER_H_
+#pragma once
+
+class AnimationContainer;
+
+// The observer is notified after every update of the animations managed by
+// the container.
+class AnimationContainerObserver {
+ public:
+  // Invoked on every tick of the timer managed by the container and after
+  // all the animations have updated.
+  virtual void AnimationContainerProgressed(
+      AnimationContainer* container) = 0;
+
+  // Invoked when no more animations are being managed by this container.
+  virtual void AnimationContainerEmpty(AnimationContainer* container) = 0;
+
+ protected:
+  virtual ~AnimationContainerObserver() {}
+};
+
+#endif  // APP_ANIMATION_CONTAINER_OBSERVER_H_