[Extensions] Migrate ExtensionInstallPrompt::Delegate to be a callback

chrome/browser/extensions/api/developer_private/show_permissions_dialog_helper.h

 // Copyright 2015 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_EXTENSIONS_API_DEVELOPER_PRIVATE_SHOW_PERMISSIONS_DIALOG_HELPER_H_
 #define CHROME_BROWSER_EXTENSIONS_API_DEVELOPER_PRIVATE_SHOW_PERMISSIONS_DIALOG_HELPER_H_
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/extensions/extension_install_prompt.h"
 
 class Profile;
 
 namespace content {
 class BrowserContext;
 class WebContents;
 }
 
 namespace extensions {
 class Extension;
 
 // Helper class to handle showing a permissions dialog for an extension. Will
 // show either the newer AppInfo-style permissions dialog, or the traditional,
 // install-prompt style dialog.
-class ShowPermissionsDialogHelper : public ExtensionInstallPrompt::Delegate {
+class ShowPermissionsDialogHelper {
  public:
   static void Show(content::BrowserContext* browser_context,
                    content::WebContents* web_contents,
                    const Extension* extension,
                    bool from_webui,
                    const base::Closure& on_complete);
 
  private:
   ShowPermissionsDialogHelper(Profile* profile,
                               const base::Closure& on_complete);
-  ~ShowPermissionsDialogHelper() override;  // Manages its own lifetime.
+  ~ShowPermissionsDialogHelper();  // Manages its own lifetime.
 
   // Shows the old-style (not AppInfo) permissions dialog.
   void ShowPermissionsDialog(content::WebContents* web_contents,
                              const Extension* extension);
 
-  // ExtensionInstallPrompt::Delegate:
-  void InstallUIProceed() override;
-  void InstallUIAbort(bool user_initiated) override;
+  void OnInstallPromptDone(ExtensionInstallPrompt::Result result);
 
   scoped_ptr<ExtensionInstallPrompt> prompt_;
 
   Profile* profile_;
 
   base::Closure on_complete_;
 
   std::string extension_id_;
 
   DISALLOW_COPY_AND_ASSIGN(ShowPermissionsDialogHelper);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_DEVELOPER_PRIVATE_SHOW_PERMISSIONS_DIALOG_HELPER_H_