cc: Make animations tick regardless of drawing.

cc/animation/layer_animation_controller.h

Index: cc/animation/layer_animation_controller.h
diff --git a/cc/animation/layer_animation_controller.h b/cc/animation/layer_animation_controller.h
index 866377f2eb9158771c200f5b752b38c12d73d128..3f9056bff1797c9199010a4169b95c00b5932428 100644
--- a/cc/animation/layer_animation_controller.h
+++ b/cc/animation/layer_animation_controller.h
@@ -52,7 +52,9 @@ class CC_EXPORT LayerAnimationController
   void Animate(double monotonic_time);
   void AccumulatePropertyUpdates(double monotonic_time,
                                  AnimationEventsVector* events);
-  void UpdateState(AnimationEventsVector* events);
+
+  void UpdateState(bool start_ready_animations,
+                   AnimationEventsVector* events);
 
   // Returns the active animation in the given group, animating the given
   // property, if such an animation exists.