Created min size for print preview dialog and modified to allow the

ui/wm/core/window_modality_controller.h

Index: ui/wm/core/window_modality_controller.h
diff --git a/ui/wm/core/window_modality_controller.h b/ui/wm/core/window_modality_controller.h
index 106db131be96645f01f04602b4665aaf314e9c45..ff82716e9bad9987d242ccdb4cc7e4cf96f66e2c 100644
--- a/ui/wm/core/window_modality_controller.h
+++ b/ui/wm/core/window_modality_controller.h
@@ -21,6 +21,12 @@ class LocatedEvent;
 
 namespace wm {
 
+// Key for native window proprety that indicates if the window (should be
+// ui::MODAL_TYPE_WINDOW) is top level with a transient parent and allows
+// events to be sent to the transient parent. Otherwise, window modal
+// transients will absorb all events sent to the transient parent.
+WM_EXPORT extern const char kAllowTransientParentEventsKey[];
+
 // Sets the modal parent for the child.
 WM_EXPORT void SetModalParent(aura::Window* child, aura::Window* parent);