App list uses PaginationModel to transition between pages.

ui/app_list/pagination_model.h

Index: ui/app_list/pagination_model.h
diff --git a/ui/app_list/pagination_model.h b/ui/app_list/pagination_model.h
index 0546adc4bf894573f1d95ab5994e94d56eeed7d5..af302308c42508f65d897b4ff4ee05891d6cf677 100644
--- a/ui/app_list/pagination_model.h
+++ b/ui/app_list/pagination_model.h
@@ -59,6 +59,10 @@ class APP_LIST_EXPORT PaginationModel : public gfx::AnimationDelegate {
   // Selects a page by relative |delta|.
   void SelectPageRelative(int delta, bool animate);
 
+  // Immediately completes all queued animations, jumping directly to the final
+  // target page.
+  void FinishAnimation();
+
   void SetTransition(const Transition& transition);
   void SetTransitionDurations(int duration_ms, int overscroll_duration_ms);
 
@@ -93,6 +97,10 @@ class APP_LIST_EXPORT PaginationModel : public gfx::AnimationDelegate {
     return transition_.target_page != -1 || transition_.progress != 0;
   }
 
+  // Gets the page that the animation will eventually land on. If there is no
+  // active animation, just returns selected_page().
+  int SelectedTargetPage() const;
+
  private:
   void NotifySelectedPageChanged(int old_selected, int new_selected);
   void NotifyTransitionStarted();