Convert WindowOpenDisposition to an enum class.

chrome/browser/apps/app_shim/extension_app_shim_handler_mac.cc

 // Copyright 2013 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/app_shim/extension_app_shim_handler_mac.h"
 
 #include "apps/app_lifetime_monitor_factory.h"
 #include "apps/launcher.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
@@ skipping 198 matching lines @@
 }
 
 void ExtensionAppShimHandler::Delegate::LaunchApp(
     Profile* profile,
     const Extension* extension,
     const std::vector<base::FilePath>& files) {
   extensions::RecordAppLaunchType(
       extension_misc::APP_LAUNCH_CMD_LINE_APP, extension->GetType());
   if (extension->is_hosted_app()) {
     OpenApplication(CreateAppLaunchParamsUserContainer(
-        profile, extension, NEW_FOREGROUND_TAB,
+        profile, extension, WindowOpenDisposition::NEW_FOREGROUND_TAB,
         extensions::SOURCE_COMMAND_LINE));
     return;
   }
   if (files.empty()) {
     apps::LaunchPlatformApp(
         profile, extension, extensions::SOURCE_COMMAND_LINE);
   } else {
     for (std::vector<base::FilePath>::const_iterator it = files.begin();
          it != files.end(); ++it) {
       apps::LaunchPlatformAppWithPath(profile, extension, *it);
@@ skipping 523 matching lines @@
   AppBrowserMap::iterator it = app_browser_windows_.find(extension->id());
   if (it != app_browser_windows_.end()) {
     BrowserSet& browsers = it->second;
     browsers.erase(browser);
     if (browsers.empty())
       OnAppDeactivated(browser->profile(), extension->id());
   }
 }
 
 }  // namespace apps