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

ui/views/widget/widget.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 UI_VIEWS_WIDGET_WIDGET_H_
 #define UI_VIEWS_WIDGET_WIDGET_H_
 
 #include <map>
 #include <memory>
 #include <set>
@@ skipping 761 matching lines @@
   // NOTE: this is not invoked for aura as it's currently not needed there.
   // Under aura menus close by way of activation getting reset when the owner
   // closes.
   virtual void OnOwnerClosing();
 
   // Returns the internal name for this Widget and NativeWidget.
   std::string GetName() const;
 
   // Overridden from NativeWidgetDelegate:
   bool IsModal() const override;
+  bool IsModalTypeChild() const override;

[Mike Wittman, 2016/07/26 17:27:35]

This function is only used in one place, so I don't think expanding the Widget
interface is justified. Better to just check the delegate modal type directly in
UpdateModalDialogPosition.

[rbpotter, 2016/07/26 21:48:19]

Done.

   bool IsDialogBox() const override;
   bool CanActivate() const override;
   bool IsAlwaysRenderAsActive() const override;
   void SetAlwaysRenderAsActive(bool always_render_as_active) override;
   void OnNativeWidgetActivationChanged(bool active) override;
   void OnNativeFocus() override;
   void OnNativeBlur() override;
   void OnNativeWidgetVisibilityChanging(bool visible) override;
   void OnNativeWidgetVisibilityChanged(bool visible) override;
   void OnNativeWidgetCreated(bool desktop_widget) override;
@@ skipping 178 matching lines @@
   bool movement_disabled_;
 
   ScopedObserver<ui::NativeTheme, ui::NativeThemeObserver> observer_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(Widget);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_WIDGET_H_