CrOS Alt+Tab UI: no-op when UI is aborted (instead of switching window).

ash/common/wm/window_cycle_controller.cc

Index: ash/common/wm/window_cycle_controller.cc
diff --git a/ash/common/wm/window_cycle_controller.cc b/ash/common/wm/window_cycle_controller.cc
index 5a0ede98a7c3c73c791afba3d4a897ec6ffaa71b..17fb0448624251c4a19f3e01833977c5f17d72cd 100644
--- a/ash/common/wm/window_cycle_controller.cc
+++ b/ash/common/wm/window_cycle_controller.cc
@@ -78,6 +78,15 @@ void WindowCycleController::StartCycling() {
                            window_list.size());
 }
 
+void WindowCycleController::CompleteCycling() {
+  window_cycle_list_->set_user_did_accept(true);
+  StopCycling();
+}
+
+void WindowCycleController::CancelCycling() {
+  StopCycling();
+}
+
 //////////////////////////////////////////////////////////////////////////////
 // WindowCycleController, private: