compositor: Tick the UI animations from cc, instead of from timer callbacks.

ui/aura/window.cc

Index: ui/aura/window.cc
diff --git a/ui/aura/window.cc b/ui/aura/window.cc
index b1e95c3f4739743c33a2f1858dcb716746dde5ce..22262d0a81480e5c3447318d20df19d62e84bba2 100644
--- a/ui/aura/window.cc
+++ b/ui/aura/window.cc
@@ -217,8 +217,11 @@ Window::Window(WindowDelegate* delegate)
 
 Window::~Window() {
   // |layer()| can be NULL during tests, or if this Window is layerless.
-  if (layer())
+  if (layer()) {
+    if (layer()->owner() == this)
+      layer()->CompleteAllAnimations();
     layer()->SuppressPaint();
+  }
 
   // Let the delegate know we're in the processing of destroying.
   if (delegate_)