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..3d868361bb317ea9c9cd87a4b2975caf29455fe3 100644
--- a/ui/wm/core/window_modality_controller.h
+++ b/ui/wm/core/window_modality_controller.h
@@ -20,6 +20,9 @@ class LocatedEvent;
 }
 
 namespace wm {
+// Key for native window property that indicates if the window should have
+// bounds independent of its modal parent. Only supported on ChromeOS.
+WM_EXPORT extern const char kHasIndependentBoundsKey[];
 
 // Sets the modal parent for the child.
 WM_EXPORT void SetModalParent(aura::Window* child, aura::Window* parent);