Separates out accelerators using non-common types

ash/common/wm/window_positioning_utils.cc

Index: ash/common/wm/window_positioning_utils.cc
diff --git a/ash/common/wm/window_positioning_utils.cc b/ash/common/wm/window_positioning_utils.cc
index 61dbf8f333268eef944b5ee0b02826b846d336a6..37d36061ba0f62b06aad2a20d8ec9acd0eb6699c 100644
--- a/ash/common/wm/window_positioning_utils.cc
+++ b/ash/common/wm/window_positioning_utils.cc
@@ -6,6 +6,8 @@
 
 #include <algorithm>
 
+#include "ash/common/wm/window_state.h"
+#include "ash/common/wm/wm_event.h"
 #include "ash/common/wm/wm_screen_util.h"
 #include "ash/common/wm_window.h"
 #include "ui/gfx/geometry/rect.h"
@@ -77,5 +79,10 @@ gfx::Rect GetDefaultRightSnappedWindowBoundsInParent(WmWindow* window) {
                    width, work_area_in_parent.height());
 }
 
+void CenterWindow(WmWindow* window) {
+  WMEvent event(WM_EVENT_CENTER);
+  window->GetWindowState()->OnWMEvent(&event);
+}
+
 }  // namespace wm
 }  // namespace ash