Making ShowExtensionInstallDialog a callback

chrome/browser/extensions/unpacked_installer.cc

 // 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.
 
 #include "chrome/browser/extensions/unpacked_installer.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/file_util.h"
 #include "base/string_util.h"
@@ skipping 43 matching lines @@
     : service_weak_(extension_service),
       extension_(extension) {
   install_ui_.reset(
       ExtensionInstallUI::CreateInstallPromptWithProfile(profile));
 }
 
 SimpleExtensionLoadPrompt::~SimpleExtensionLoadPrompt() {
 }
 
 void SimpleExtensionLoadPrompt::ShowPrompt() {
-  install_ui_->ConfirmInstall(this, extension_);
+  install_ui_->ConfirmInstall(
+      this, extension_, ExtensionInstallPrompt::GetDefaultShowDialogCallback());
 }
 
 void SimpleExtensionLoadPrompt::InstallUIProceed() {
   if (service_weak_.get()) {
     extensions::PermissionsUpdater perms_updater(service_weak_->profile());
     perms_updater.GrantActivePermissions(extension_, false);
     service_weak_->OnExtensionInstalled(
         extension_,
         syncer::StringOrdinal(),
         false /* no requirement errors */);
@@ skipping 184 matching lines @@
   }
 
   PermissionsUpdater perms_updater(service_weak_->profile());
   perms_updater.GrantActivePermissions(extension_, false);
   service_weak_->OnExtensionInstalled(extension_,
                                       syncer::StringOrdinal(),
                                       false /* no requirement errors */);
 }
 
 }  // namespace extensions