Convert WindowOpenDisposition to an enum class.

chrome/browser/ui/views/frame/browser_window_property_manager_browsertest_win.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 <string>
 
 #include <shlobj.h>  // Must be before propkey.
 #include <propkey.h>
 #include <shellapi.h>
 #include <stddef.h>
@@ skipping 223 matching lines @@
   if (base::win::GetVersion() < base::win::VERSION_WIN7)
     return;
 
   // Load an app.
   const extensions::Extension* extension =
       LoadExtension(test_data_dir_.AppendASCII("app/"));
   EXPECT_TRUE(extension);
 
   OpenApplication(AppLaunchParams(
       browser()->profile(), extension, extensions::LAUNCH_CONTAINER_WINDOW,
-      NEW_FOREGROUND_TAB, extensions::SOURCE_TEST));
+      WindowOpenDisposition::NEW_FOREGROUND_TAB, extensions::SOURCE_TEST));
 
   // Check that the new browser has an app name.
   // The launch should have created a new browser.
   ASSERT_EQ(2u, chrome::GetBrowserCount(browser()->profile()));
 
   // Find the new browser.
   Browser* app_browser = nullptr;
   for (auto* b : *BrowserList::GetInstance()) {
     if (b != browser())
       app_browser = b;
   }
   ASSERT_TRUE(app_browser);
   ASSERT_TRUE(app_browser != browser());
 
   WaitAndValidateBrowserWindowProperties(
       base::Bind(&ValidateHostedAppWindowProperties, app_browser, extension));
 }