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

components/constrained_window/constrained_window_views.h

Index: components/constrained_window/constrained_window_views.h
diff --git a/components/constrained_window/constrained_window_views.h b/components/constrained_window/constrained_window_views.h
index e8c057f1561e628f003021e66f8a8c941dbbd6b3..8857b2d3ea20eeb93b490ac00d4abbda82168a4b 100644
--- a/components/constrained_window/constrained_window_views.h
+++ b/components/constrained_window/constrained_window_views.h
@@ -47,11 +47,28 @@ void UpdateWidgetModalDialogPosition(
 void ShowModalDialog(gfx::NativeWindow dialog,
                      content::WebContents* web_contents);
 
+// Shows the dialog with a new SingleWebContentsDialogManager in a non clipped
+// display (not confined to the bounds of the parent window) if this is
+// supported by the platform (currently Chrome OS and Mac only). The dialog will
+// notify via WillClose() when it is being destroyed.
+void ShowNonClippedModalDialog(gfx::NativeWindow dialog,
+                               content::WebContents* web_contents);
+
 // Calls CreateWebModalDialogViews, shows the dialog, and returns its widget.
 views::Widget* ShowWebModalDialogViews(
     views::WidgetDelegate* dialog,
     content::WebContents* initiator_web_contents);
 
+// Calls CreateWebModalDialogViews, shows the dialog as a non-clipped dialog
+// (bounds not constrained by the parent window) and returns its widget. For
+// platforms that do not support unclipped dialogs and for Mac, which has
+// nonclipped dialogs by default, this has the same behavior as

[Lei Zhang, 2016/08/19 03:28:47]

non-clipped

[rbpotter, 2016/08/19 16:59:42]

Done.

+// ShowWebModalDialogViews. Currently, unclipped dialogs are only supported on
+// Chrome OS and Mac (Mac dialogs are always non clipped).
+views::Widget* ShowNonClippedWebModalDialogViews(
+    views::WidgetDelegate* dialog,
+    content::WebContents* initiator_web_contents);
+
 // Create a widget for |dialog| that is modal to |web_contents|.
 // The modal type of |dialog->GetModalType()| must be ui::MODAL_TYPE_CHILD.
 views::Widget* CreateWebModalDialogViews(views::WidgetDelegate* dialog,