app: Remove animation header files.

app/animation_delegate.h

Index: app/animation_delegate.h
diff --git a/app/animation_delegate.h b/app/animation_delegate.h
deleted file mode 100644
index bed2c9d3a95ebca5f9ec2bb72a48c8311ecaaef3..0000000000000000000000000000000000000000
--- a/app/animation_delegate.h
+++ /dev/null
@@ -1,30 +0,0 @@
-// 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_DELEGATE_H_
-#define APP_ANIMATION_DELEGATE_H_
-#pragma once
-
-class Animation;
-
-// AnimationDelegate
-//
-//  Implement this interface when you want to receive notifications about the
-//  state of an animation.
-class AnimationDelegate {
- public:
-  // Called when an animation has completed.
-  virtual void AnimationEnded(const Animation* animation) {}
-
-  // Called when an animation has progressed.
-  virtual void AnimationProgressed(const Animation* animation) {}
-
-  // Called when an animation has been canceled.
-  virtual void AnimationCanceled(const Animation* animation) {}
-
- protected:
-  virtual ~AnimationDelegate() {}
-};
-
-#endif  // APP_ANIMATION_DELEGATE_H_