Moves WindowCycleList/Controller to ash/common

ash/common/wm_shell.cc

Index: ash/common/wm_shell.cc
diff --git a/ash/common/wm_shell.cc b/ash/common/wm_shell.cc
index 0bb9851c42ebbe41d4c0ed4e7cb60e16afa41a02..cf87b86c42e8e718a1189627417a3a9c159ab4ff 100644
--- a/ash/common/wm_shell.cc
+++ b/ash/common/wm_shell.cc
@@ -18,6 +18,7 @@
 #include "ash/common/wm/maximize_mode/maximize_mode_controller.h"
 #include "ash/common/wm/mru_window_tracker.h"
 #include "ash/common/wm/overview/window_selector_controller.h"
+#include "ash/common/wm/window_cycle_controller.h"
 #include "ash/common/wm_window.h"
 #include "base/bind.h"
 #include "base/logging.h"
@@ -90,6 +91,7 @@ WmShell::WmShell(std::unique_ptr<ShellDelegate> shell_delegate)
   brightness_control_delegate_.reset(new system::BrightnessControllerChromeos);
   keyboard_brightness_control_delegate_.reset(new KeyboardBrightnessController);
 #endif
+  window_cycle_controller_.reset(new WindowCycleController());
 }
 
 WmShell::~WmShell() {}
@@ -140,6 +142,10 @@ void WmShell::DeleteSystemTrayDelegate() {
   system_tray_delegate_.reset();
 }
 
+void WmShell::DeleteWindowCycleController() {
+  window_cycle_controller_.reset();
+}
+
 void WmShell::DeleteWindowSelectorController() {
   window_selector_controller_.reset();
 }