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

components/constrained_window/native_web_contents_modal_dialog_manager_views_mac.mm

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/constrained_window/native_web_contents_modal_dialog_manager_views_mac.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "components/constrained_window/constrained_window_views.h"
 #include "components/guest_view/browser/guest_view_base.h"
@@ skipping 21 matching lines @@
 }
 
 }  // namespace
 
 namespace constrained_window {
 
 NativeWebContentsModalDialogManagerViewsMac::
     NativeWebContentsModalDialogManagerViewsMac(
         gfx::NativeWindow dialog,
         web_modal::SingleWebContentsDialogManagerDelegate* native_delegate)
-    : NativeWebContentsModalDialogManagerViews(dialog, native_delegate) {}
+    : NativeWebContentsModalDialogManagerViews(dialog, native_delegate,
+                                               false, NULL) {}
 
 // NativeWebContentsModalDialogManagerViews:
 void NativeWebContentsModalDialogManagerViewsMac::OnPositionRequiresUpdate() {
   NativeWebContentsModalDialogManagerViews::OnPositionRequiresUpdate();
 
   views::Widget* widget = GetWidget(dialog());
   // Because the animation of SFCertificatePanel will change depending on the
   // size of the parent, i.e. |widget|, make sure its size is the same as the
   // area under the Chrome UI. The origin of the dialog then also needs to be
   // updated to position the certificate viewer in the middle horizontally.
@@ skipping 36 matching lines @@
 void NativeWebContentsModalDialogManagerViewsMac::HideWidget(
     views::Widget* widget) {
   NSWindow* dialog_window = widget->GetNativeWindow();
   // Avoid views::Widget::Hide(), as a call to orderOut: on a NSWindow with an
   // attached sheet will close the sheet. Instead, just set the sheet to 0
   // opacity and don't accept click events.
   SetSheetVisible(dialog_window, false);
 }
 
 }  // namespace constrained_window