Share animations from compositor to main thread.

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"
+#include "cc/animation/animation_curve.h"
 
 namespace cc {
 
 class CC_EXPORT AnimationDelegate {
  public:
   virtual void NotifyAnimationStarted(base::TimeTicks monotonic_time,
                                       TargetProperty::Type target_property,
                                       int group) = 0;
   virtual void NotifyAnimationFinished(base::TimeTicks monotonic_time,
                                        TargetProperty::Type target_property,
                                        int group) = 0;
 
   virtual void NotifyAnimationAborted(base::TimeTicks monotonic_time,
                                       TargetProperty::Type target_property,
                                       int group) = 0;
 
+  virtual void NotifyAnimationTakeover(base::TimeTicks monotonic_time,
+                                       double animation_start_time,

[ajuma, 2016/02/26 23:56:54]

This should include a target property (even if we happen to only be using it for
scroll animations right now).

[ymalik, 2016/02/29 16:31:09]

Totally. Done thanks!

+                                       scoped_ptr<AnimationCurve> curve) = 0;
+
  protected:
   virtual ~AnimationDelegate() {}
 };
 
 }  // namespace cc
 
 #endif  // CC_ANIMATION_ANIMATION_DELEGATE_H_