Convert WindowOpenDisposition to an enum class.

chrome/browser/apps/install_chrome_app.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/apps/install_chrome_app.h"
 
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 65 matching lines @@
 void InstallChromeApp(const std::string& app_id) {
   if (!crx_file::id_util::IdIsValid(app_id))
     return;
 
   // At the moment InstallChromeApp() is called immediately after handling
   // startup URLs, so a browser is guaranteed to be created. If that changes we
   // may need to start a browser or browser session here.
   Browser* browser = BrowserList::GetInstance()->get(0);
   DCHECK(browser);
 
-  content::OpenURLParams params(GetAppInstallUrl(app_id),
-                                content::Referrer(),
-                                NEW_FOREGROUND_TAB,
-                                ui::PAGE_TRANSITION_AUTO_TOPLEVEL,
-                                false);
+  content::OpenURLParams params(GetAppInstallUrl(app_id), content::Referrer(),
+                                WindowOpenDisposition::NEW_FOREGROUND_TAB,
+                                ui::PAGE_TRANSITION_AUTO_TOPLEVEL, false);
   browser->OpenURL(params);
 
   ExtensionRegistry* registry = ExtensionRegistry::Get(browser->profile());
   // Skip if this app is already installed or blacklisted. For disabled or
   // or terminated apps, going through the installation flow should re-enable
   // them.
   const extensions::Extension* installed_extension = registry->GetExtensionById(
       app_id, ExtensionRegistry::ENABLED | ExtensionRegistry::BLACKLISTED);
   // TODO(jackhou): For installed apps, maybe we should do something better,
   // e.g. show the app list (and re-add it to the taskbar).
   if (installed_extension)
     return;
 
   WebstoreInstallWithPromptAppsOnly* installer =
       new WebstoreInstallWithPromptAppsOnly(
           app_id, browser->profile(), browser->window()->GetNativeWindow());
   installer->BeginInstall();
 }
 
 }  // namespace install_chrome_app