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

ui/views/widget/widget_delegate.h

Index: ui/views/widget/widget_delegate.h
diff --git a/ui/views/widget/widget_delegate.h b/ui/views/widget/widget_delegate.h
index 8a344c5562371f2a1ec10b5e809aca43ee78ab4c..c0ae4489e84971c509655b03e0d918240478a183 100644
--- a/ui/views/widget/widget_delegate.h
+++ b/ui/views/widget/widget_delegate.h
@@ -36,6 +36,10 @@ class VIEWS_EXPORT WidgetDelegate {
     can_activate_ = can_activate;
   }
 
+  void set_top_level(bool is_top_level) {
+    is_top_level_ = is_top_level;
+  }
+
   // Called whenever the widget's position changes.
   virtual void OnWidgetMove();
 
@@ -65,6 +69,8 @@ class VIEWS_EXPORT WidgetDelegate {
   // Returns true if the window can be activated.
   virtual bool CanActivate() const;
 
+  virtual bool IsTopLevel() const;
+
   // Returns the modal type that applies to the widget. Default is
   // ui::MODAL_TYPE_NONE (not modal).
   virtual ui::ModalType GetModalType() const;
@@ -191,6 +197,7 @@ class VIEWS_EXPORT WidgetDelegate {
   View* default_contents_view_;
 
   bool can_activate_;
+  bool is_top_level_;
 
   DISALLOW_COPY_AND_ASSIGN(WidgetDelegate);
 };