Making ShowExtensionInstallDialog a callback

chrome/browser/extensions/webstore_installer.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 CHROME_BROWSER_EXTENSIONS_WEBSTORE_INSTALLER_H_
 #define CHROME_BROWSER_EXTENSIONS_WEBSTORE_INSTALLER_H_
 
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/supports_user_data.h"
 #include "base/values.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/download_id.h"
 #include "content/public/browser/download_item.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/net_errors.h"
 
+class ExtensionInstallDialog;
 class FilePath;
 class Profile;
 
 namespace content {
 class NavigationController;
 }
 
 namespace extensions {
 
 // Downloads and installs extensions from the web store.
@@ skipping 61 matching lines @@
 
     // Whether to skip the install dialog once the extension has been downloaded
     // and unpacked. One reason this can be true is that in the normal webstore
     // installation, the dialog is shown earlier, before any download is done,
     // so there's no need to show it again.
     bool skip_install_dialog;
 
     // Whether we should record an oauth2 grant for the extensions.
     bool record_oauth2_grant;
 
+    // Used to show the confirm dialog.
+    scoped_refptr<ExtensionInstallDialog> dialog_;
+
    private:
     Approval();
   };
 
   // Gets the Approval associated with the |download|, or NULL if there's none.
   // Note that the Approval is owned by |download|.
   static const Approval* GetAssociatedApproval(
       const content::DownloadItem& download);
 
   // Creates a WebstoreInstaller for downloading and installing the extension
@@ skipping 55 matching lines @@
   // The DownloadItem is owned by the DownloadManager and is valid from when
   // OnDownloadStarted is called (with no error) until OnDownloadDestroyed().
   content::DownloadItem* download_item_;
   scoped_ptr<Approval> approval_;
   GURL download_url_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_WEBSTORE_INSTALLER_H_