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

components/constrained_window/constrained_window_views.h

 // Copyright (c) 2012 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_CONSTRAINED_WINDOW_VIEWS_H_
 #define COMPONENTS_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_VIEWS_H_
 
 #include <memory>
 
+#include "ui/base/accelerators/accelerator.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace content {
 class WebContents;
 }
 
 namespace views {
 class DialogDelegate;
 class Widget;
 class WidgetDelegate;
@@ skipping 20 matching lines @@
 
 void UpdateWidgetModalDialogPosition(
     views::Widget* widget,
     web_modal::ModalDialogHost* dialog_host);
 
 // Shows the dialog with a new SingleWebContentsDialogManager. The dialog will
 // notify via WillClose() when it is being destroyed.
 void ShowModalDialog(gfx::NativeWindow dialog,
                      content::WebContents* web_contents);
 
+// Shows the dialog with a new SingleWebContentsDialogManager as a top level
+// dialog (peer of the |web_contents| native window dialog host rather than a

[sky, 2016/09/16 16:40:24]

It isn't a peer, is it? It's a top level, right?

+// child). The dialog is top level but will not block access to the dialog host
+// window, which will be its transient parent. The dialog will notify via
+// WillClose() when it is being destroyed. |target| will be attached to the host
+// window as a handler for accelerators.
+void ShowTopLevelModalDialog(gfx::NativeWindow dialog,

[sky, 2016/09/16 16:40:24]

Can we move this logic into ShowWebModalDialogViews? In other words, do we
really need to support both variants? Or said differently, can we make all web
modal dialogs get the new behavior?

+                             content::WebContents* web_contents,
+                             ui::AcceleratorTarget *target);
+
 // Calls CreateWebModalDialogViews, shows the dialog, and returns its widget.
 views::Widget* ShowWebModalDialogViews(
     views::WidgetDelegate* dialog,
     content::WebContents* initiator_web_contents);
 
 #if defined(OS_MACOSX)
 // Like ShowWebModalDialogViews, but used to show a native dialog "sheet" on
 // Mac. Sheets are always modal to their parent window. To make them tab-modal,
 // this provides an invisible tab-modal overlay window managed by
 // WebContentsModalDialogManager, which can host a dialog sheet.
 views::Widget* ShowWebModalDialogWithOverlayViews(
     views::WidgetDelegate* dialog,
     content::WebContents* initiator_web_contents);
 #endif
 
+// Creates a widget for |dialog| and shows the dialog as a top level dialog
+// that does not block events to the top level dialog host window for
+// |web_contents|. Returns the widget created. For Mac, which uses sheets,
+// this has the same behavior as ShowWebModalDialogViews.
+views::Widget* ShowTopLevelWebModalDialogViews(

[sky, 2016/09/16 16:40:24]

I'm confused by the need for this and ShowTopLevelModalDialog. They have roughly
the same description. Maybe I'm missing something?

+    views::WidgetDelegate* dialog,
+    content::WebContents* initiator_web_contents,
+    ui::AcceleratorTarget* target);
+
 // 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,
                                          content::WebContents* web_contents);
 
 // Create a widget for |dialog| that has a modality given by
 // |dialog->GetModalType()|.  The modal type must be either
 // ui::MODAL_TYPE_SYSTEM or ui::MODAL_TYPE_WINDOW.  This places the
 // dialog appropriately if |parent| is a valid browser window.
 views::Widget* CreateBrowserModalDialogViews(views::DialogDelegate* dialog,
                                              gfx::NativeWindow parent);
 
 }  // namespace constrained_window
 
 #endif  // COMPONENTS_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_VIEWS_H_