Moves WindowCycleList/Controller to ash/common

ash/mus/bridge/wm_shell_mus.cc

Index: ash/mus/bridge/wm_shell_mus.cc
diff --git a/ash/mus/bridge/wm_shell_mus.cc b/ash/mus/bridge/wm_shell_mus.cc
index 6f39f651f7055888fc3bb2dc8c82abdb86c437e1..20c9a4ef3e3ef96d4a4c687d9aa333de2fb8bce5 100644
--- a/ash/mus/bridge/wm_shell_mus.cc
+++ b/ash/mus/bridge/wm_shell_mus.cc
@@ -108,6 +108,8 @@ WmShellMus::WmShellMus(std::unique_ptr<ShellDelegate> shell_delegate,
 
   CreateMruWindowTracker();
 
+  CreateWindowCycleController();
+
   SetSystemTrayDelegate(base::WrapUnique(new DefaultSystemTrayDelegate));
 
   // TODO(jamescook): Port ash::sysui::KeyboardUIMus and use it here.
@@ -121,6 +123,7 @@ WmShellMus::~WmShellMus() {
   // need to be removed.
   DeleteMaximizeModeController();
   DeleteSystemTrayDelegate();
+  DeleteWindowCycleController();
   DeleteWindowSelectorController();
   DeleteMruWindowTracker();
   RemoveClientObserver();