Add a Cocoa version of the auto-dismissing dialog.

chrome/browser/ui/javascript_dialogs/javascript_dialog_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_JAVASCRIPT_DIALOGS_JAVASCRIPT_DIALOG_VIEWS_H_
 #define CHROME_BROWSER_UI_JAVASCRIPT_DIALOGS_JAVASCRIPT_DIALOG_VIEWS_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
+#include "chrome/browser/ui/javascript_dialogs/javascript_dialog.h"
 #include "content/public/browser/javascript_dialog_manager.h"
 #include "ui/views/window/dialog_delegate.h"
 
 namespace views {
 class MessageBoxView;
 }
 
 // A Views version of a JavaScript dialog that automatically dismisses itself
 // when the user switches away to a different tab, used for WebContentses that
 // are browser tabs.
-class JavaScriptDialogViews : public views::DialogDelegate {
+class JavaScriptDialogViews : public JavaScriptDialog,
+                              public views::DialogDelegate {
  public:
   ~JavaScriptDialogViews() override;
 
   static base::WeakPtr<JavaScriptDialogViews> Create(
       content::WebContents* parent_web_contents,
       content::WebContents* alerting_web_contents,
       const base::string16& title,
       content::JavaScriptMessageType message_type,
       const base::string16& message_text,
       const base::string16& default_prompt_text,
       const content::JavaScriptDialogManager::DialogClosedCallback&
           dialog_callback);
 
-  // Closes the dialog without sending a callback. This is useful when the
-  // JavaScriptDialogTabHelper needs to make this dialog go away so that it can
-  // respond to a call that requires it to make no callback or make a customized
-  // one.
-  void CloseDialogWithoutCallback();
+  // JavaScriptDialog:
+  void CloseDialogWithoutCallback() override;
 
   // views::DialogDelegate:
   int GetDefaultDialogButton() const override;
   int GetDialogButtons() const override;
   base::string16 GetWindowTitle() const override;
   bool Cancel() override;
   bool Accept() override;
   bool Close() override;
   void DeleteDelegate() override;
 
@@ skipping 23 matching lines @@
 
   // The message box view whose commands we handle.
   views::MessageBoxView* message_box_view_;
 
   base::WeakPtrFactory<JavaScriptDialogViews> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(JavaScriptDialogViews);
 };
 
 #endif  // CHROME_BROWSER_UI_JAVASCRIPT_DIALOGS_JAVASCRIPT_DIALOG_VIEWS_H_