Reland r107720 - Enable the new layer animation framework.

ui/gfx/compositor/layer_animator.h

Index: ui/gfx/compositor/layer_animator.h
diff --git a/ui/gfx/compositor/layer_animator.h b/ui/gfx/compositor/layer_animator.h
index a51079c46a8e205e73c5fa94eea84aa01c2fced0..1216a04246c0c6e12402557b7dbf8ae69faebed5 100644
--- a/ui/gfx/compositor/layer_animator.h
+++ b/ui/gfx/compositor/layer_animator.h
@@ -50,12 +50,15 @@ class COMPOSITOR_EXPORT LayerAnimator : public AnimationContainerElement {
 
   // Sets the transform on the delegate. May cause an implicit animation.
   virtual void SetTransform(const Transform& transform);
+  Transform GetTargetTransform() const;
 
   // Sets the bounds on the delegate. May cause an implicit animation.
   virtual void SetBounds(const gfx::Rect& bounds);
+  gfx::Rect GetTargetBounds() const;
 
   // Sets the opacity on the delegate. May cause an implicit animation.
   virtual void SetOpacity(float opacity);
+  float GetTargetOpacity() const;
 
   // Sets the layer animation delegate the animator is associated with. The
   // animator does not own the delegate.
@@ -176,6 +179,10 @@ class COMPOSITOR_EXPORT LayerAnimator : public AnimationContainerElement {
   // properties affected by |sequence|.
   bool StartSequenceImmediately(LayerAnimationSequence* sequence);
 
+  // Sets the value of delegate as if all the running and queued animations were
+  // allowed to finish.
+  void SetTarget(LayerAnimationDelegate* delegate) const;
+
   // This is the queue of animations to run.
   AnimationQueue animation_queue_;