MacViews: Remove constrained window dependencies for certificate viewer.

chrome/browser/ui/views/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 CHROME_BROWSER_UI_VIEWS_NATIVE_WEB_CONTENTS_MODAL_DIALOG_MANAGER_VIEWS_H_
 #define CHROME_BROWSER_UI_VIEWS_NATIVE_WEB_CONTENTS_MODAL_DIALOG_MANAGER_VIEWS_H_
 
 #include <set>
 
 #include "base/macros.h"
@@ skipping 41 matching lines @@
   // ordering in e.g. the print preview dialog. OnWidgetDestroying is overridden
   // because OnWidgetClosing is *only* invoked on explicit close, not when the
   // widget is implicitly destroyed due to its parent being closed. This
   // situation occurs with app windows.  WidgetClosing removes the observer, so
   // only one of these two functions is ever invoked for a given widget.
   void OnWidgetClosing(views::Widget* widget) override;
   void OnWidgetDestroying(views::Widget* widget) override;
   void HostChanged(web_modal::WebContentsModalDialogHost* new_host) override;
   gfx::NativeWindow dialog() override;
 
+ protected:
+  web_modal::SingleWebContentsDialogManagerDelegate* native_delegate();
+
+  // By default just calls widget->Show() or Hide(), but allows a derived class
+  // to override in order to hide an alternate way (e.g. if the default hide
+  // would tear down attached dialogs too early).
+  virtual void ShowWidget(views::Widget* widget);
+  virtual void HideWidget(views::Widget* widget);
+
+  static views::Widget* GetWidget(gfx::NativeWindow dialog);
+
  private:
-  static views::Widget* GetWidget(gfx::NativeWindow dialog);
   void WidgetClosing(views::Widget* widget);
 
   web_modal::SingleWebContentsDialogManagerDelegate* native_delegate_;
   gfx::NativeWindow dialog_;
   web_modal::WebContentsModalDialogHost* host_;
   bool host_destroying_;
   std::set<views::Widget*> observed_widgets_;
   std::set<views::Widget*> shown_widgets_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeWebContentsModalDialogManagerViews);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_NATIVE_WEB_CONTENTS_MODAL_DIALOG_MANAGER_VIEWS_H_