Blink Compositor Animation: Erase old animation system.

third_party/WebKit/Source/platform/animation/CompositorAnimation.cpp

 // Copyright 2016 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.
 
 #include "platform/animation/CompositorAnimation.h"
 
 #include "cc/animation/animation.h"
 #include "cc/animation/animation_curve.h"
 #include "cc/animation/animation_id_provider.h"
 #include "platform/animation/CompositorAnimationCurve.h"
@@ skipping 183 matching lines @@
         break;
     }
 }
 
 scoped_ptr<cc::Animation> CompositorAnimation::passAnimation()
 {
     m_animation->set_needs_synchronized_start_time(true);
     return std::move(m_animation);
 }
 
-cc::Animation* CompositorAnimation::releaseCCAnimation()
-{
-    m_animation->set_needs_synchronized_start_time(true);
-    return m_animation.release();
-}
-
 } // namespace blink