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 24 matching lines @@
 
 // Returns the top level WebContents of |initiator_web_contents|.
 content::WebContents* GetTopLevelWebContents(
     content::WebContents* initiator_web_contents);
 
 // 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);
 
-// Calls CreateWebModalDialogViews, shows the dialog, and returns its widget.
+// Shows the dialog with a new SingleWebContentsDialogManager as a top level
+// dialog. The dialog is top level but will not block events to the dialog host
+// window. The dialog will be a transient child of the host window (Windows) or
+// of its parent (Linux/CrOS). The dialog will notify via WillClose() when it is
+// being destroyed. |target| will be attached to the host window as a handler
+// for accelerators. Note that unlike ShowTopLevelWebModalDialogViews, |dialog|
+// should already have a widget before this is called.
+void ShowTopLevelModalDialog(gfx::NativeWindow dialog,
+                             content::WebContents* web_contents,
+                             ui::AcceleratorTarget *target);
+
+// If |dialog| is child modal, calls CreateWebModalDialogViews, shows the
+// dialog, and returns its widget. If |dialog| is not child modal, create a
+// widget for |dialog| and show the dialog as a top level dialog without
+// blocking events to the top level dialog host window for |web_contents|. The
+// modal type will be the same as that of |dialog|. For Mac, which uses sheets,
+// this has the same behavior as ShowWebModalDialogViews. If non-null and
+// if |dialog| is not child modal, |target| will be attached to the host window
+// as a handler for accelerators.
+views::Widget* ShowWebModalDialogViews(
+    views::WidgetDelegate* dialog,
+    content::WebContents* initiator_web_contents,
+    ui::AcceleratorTarget* target);
+
+// Calls the function above with |target| = nullptr. |dialog| should be child
+// modal.
 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(
@@ skipping 11 matching lines @@
 // ui::MODAL_TYPE_SYSTEM or ui::MODAL_TYPE_WINDOW.  This places the dialog
 // appropriately if |parent| is a valid browser window. Currently, |parent| may
 // be null for MODAL_TYPE_WINDOW, but that's a bug and callers shouldn't rely on
 // that working. See http://crbug.com/657293.
 views::Widget* CreateBrowserModalDialogViews(views::DialogDelegate* dialog,
                                              gfx::NativeWindow parent);
 
 }  // namespace constrained_window
 
 #endif  // COMPONENTS_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_VIEWS_H_