Enable ash window cycle UI by default.

ash/common/wm/window_cycle_list.h

Index: ash/common/wm/window_cycle_list.h
diff --git a/ash/common/wm/window_cycle_list.h b/ash/common/wm/window_cycle_list.h
index 34af309cdbf1802dfb837b67838a2786b2fc0ee7..6d073d1602e189fa8cdcb6f0a59bdee82f404a7e 100644
--- a/ash/common/wm/window_cycle_list.h
+++ b/ash/common/wm/window_cycle_list.h
@@ -42,6 +42,9 @@ class ASH_EXPORT WindowCycleList : public WmWindowObserver {
 
  private:
   friend class WindowCycleControllerTest;
+
+  static void DisableInitialDelayForTesting();
+
   const WindowList& windows() const { return windows_; }
 
   // WmWindowObserver overrides:
@@ -67,6 +70,8 @@ class ASH_EXPORT WindowCycleList : public WmWindowObserver {
   int current_index_;
 
   // Wrapper for the window brought to the front.
+  // TODO(estade): remove ScopedShowWindow when we know we are happy launching
+  // the |cycle_view_| version.
   std::unique_ptr<ScopedShowWindow> showing_window_;
 
   // The top level View for the window cycle UI. May be null if the UI is not