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

components/constrained_window/native_web_contents_modal_dialog_manager_views.h

 // 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.
 
 #ifndef COMPONENTS_CONSTRAINED_WINDOW_NATIVE_WEB_CONTENTS_MODAL_DIALOG_MANAGER_VIEWS_H_
 #define COMPONENTS_CONSTRAINED_WINDOW_NATIVE_WEB_CONTENTS_MODAL_DIALOG_MANAGER_VIEWS_H_
 
 #include <set>
 
 #include "base/macros.h"
 #include "components/web_modal/modal_dialog_host.h"
 #include "components/web_modal/single_web_contents_dialog_manager.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/views/widget/widget_observer.h"
 
 namespace views {
 class Widget;
 }
 
 namespace constrained_window {
 
 // Class for parenting a tab-modal views dialog off of a views browser.
 class NativeWebContentsModalDialogManagerViews
     : public web_modal::SingleWebContentsDialogManager,
       public web_modal::ModalDialogHostObserver,
       public views::WidgetObserver {
  public:
   NativeWebContentsModalDialogManagerViews(
       gfx::NativeWindow dialog,
-      web_modal::SingleWebContentsDialogManagerDelegate* native_delegate);
+      web_modal::SingleWebContentsDialogManagerDelegate* native_delegate,
+      bool is_nonclipped);
 
   ~NativeWebContentsModalDialogManagerViews() override;
 
   // Sets up this object to manage the |dialog_|. Registers for closing events
-  // in order to notify the delegate.
-  void ManageDialog();
+  // in order to notify the delegate. If |is_nonclipped| is true and the
+  // platform supports non-clipped dialogs (currently Chrome OS only), the
+  // dialog will not be confined to the bounds of its parent window.
+  void ManageDialog(bool is_nonclipped);
 
   // web_modal::SingleWebContentsDialogManager:
   void Show() override;
   void Hide() override;
   void Close() override;
   void Focus() override;
   void Pulse() override;
 
   // web_modal::ModalDialogHostObserver:
   void OnPositionRequiresUpdate() override;
@@ skipping 24 matching lines @@
   bool host_destroying_;
   std::set<views::Widget*> observed_widgets_;
   std::set<views::Widget*> shown_widgets_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeWebContentsModalDialogManagerViews);
 };
 
 }  // namespace constrained_window
 
 #endif  // COMPONENTS_CONSTRAINED_WINDOW_NATIVE_WEB_CONTENTS_MODAL_DIALOG_MANAGER_VIEWS_H_