[Refactor] Move creating a browser if necessary to ExtensionInstallDialogView

chrome/browser/extensions/external_install_error.cc

 // Copyright 2014 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/external_install_error.h"
 
 #include "base/bind.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 348 matching lines @@
     const std::string& error) {
   OnFetchComplete();
 }
 
 void ExternalInstallError::OnFetchComplete() {
   // Create a new ExtensionInstallPrompt. We pass in NULL for the UI
   // components because we display at a later point, and don't want
   // to pass ones which may be invalidated.
   install_ui_.reset(
       new ExtensionInstallPrompt(Profile::FromBrowserContext(browser_context_),
-                                 NULL,    // NULL native window.
-                                 NULL));  // NULL navigator.
+                                 NULL));  // NULL native window.
 
   install_ui_->ConfirmExternalInstall(
       this,
       GetExtension(),
       base::Bind(&ExternalInstallError::OnDialogReady,
                  weak_factory_.GetWeakPtr()),
       prompt_);
 }
 
 void ExternalInstallError::OnDialogReady(
@@ skipping 14 matching lines @@
     if (browser)
       global_error_->ShowBubbleView(browser);
   } else {
     DCHECK(alert_type_ == MENU_ALERT);
     global_error_.reset(new ExternalInstallMenuAlert(this));
     error_service_->AddGlobalError(global_error_.get());
   }
 }
 
 }  // namespace extensions