Remove parts of //cc we aren't using

cc/animation/animation_delegate.h

-// Copyright 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 CC_ANIMATION_ANIMATION_DELEGATE_H_
-#define CC_ANIMATION_ANIMATION_DELEGATE_H_
-
-#include "base/time/time.h"
-#include "cc/animation/animation.h"
-
-namespace cc {
-
-class CC_EXPORT AnimationDelegate {
- public:
-  virtual void NotifyAnimationStarted(base::TimeTicks monotonic_time,
-                                      Animation::TargetProperty target_property,
-                                      int group) = 0;
-  virtual void NotifyAnimationFinished(
-      base::TimeTicks monotonic_time,
-      Animation::TargetProperty target_property,
-      int group) = 0;
-
- protected:
-  virtual ~AnimationDelegate() {}
-};
-
-}  // namespace cc
-
-#endif  // CC_ANIMATION_ANIMATION_DELEGATE_H_