athena: Fix switching to a window of a different size.

athena/wm/window_overview_mode.cc

Index: athena/wm/window_overview_mode.cc
diff --git a/athena/wm/window_overview_mode.cc b/athena/wm/window_overview_mode.cc
index 8677e42a9c15396d69353a794618ec6754c85e56..b34229309a2c5326c51df2b892a8cd3cdf656cbe 100644
--- a/athena/wm/window_overview_mode.cc
+++ b/athena/wm/window_overview_mode.cc
@@ -198,13 +198,9 @@ class WindowOverviewModeImpl : public WindowOverviewMode,
           window->layer()->GetAnimator();
 
       // Unset any in-progress animation.
-      {
-        ui::ScopedLayerAnimationSettings settings(animator);
-        settings.SetPreemptionStrategy(
-            ui::LayerAnimator::IMMEDIATELY_SET_NEW_TARGET);
-        window->Show();
-        window->SetTransform(gfx::Transform());
-      }
+      animator->AbortAllAnimations();
+      window->Show();
+      window->SetTransform(gfx::Transform());
       // Setup the animation.
       {
         ui::ScopedLayerAnimationSettings settings(animator);