Separates out accelerators using non-common types

ash/common/wm/window_positioning_utils.h

Index: ash/common/wm/window_positioning_utils.h
diff --git a/ash/common/wm/window_positioning_utils.h b/ash/common/wm/window_positioning_utils.h
index eb12b60d54705a74ca0436d60e2447aa108cce08..30aca7ac28ff5d350773efb318caa42da369f8c2 100644
--- a/ash/common/wm/window_positioning_utils.h
+++ b/ash/common/wm/window_positioning_utils.h
@@ -51,6 +51,9 @@ ASH_EXPORT gfx::Rect GetDefaultLeftSnappedWindowBoundsInParent(
 ASH_EXPORT gfx::Rect GetDefaultRightSnappedWindowBoundsInParent(
     WmWindow* window);
 
+// Moves the window to the center of the display.
+ASH_EXPORT void CenterWindow(WmWindow* window);
+
 }  // namespace wm
 }  // namespace ash