Convert WindowOpenDisposition to an enum class.

chrome/browser/policy/policy_browsertest.cc

Index: chrome/browser/policy/policy_browsertest.cc
diff --git a/chrome/browser/policy/policy_browsertest.cc b/chrome/browser/policy/policy_browsertest.cc
index 94e0a495987c8d806527b6d95895e96d5a4f4cc7..0ae062c3341038b0590878aed6c3ec02b698bd4f 100644
--- a/chrome/browser/policy/policy_browsertest.cc
+++ b/chrome/browser/policy/policy_browsertest.cc
@@ -2545,9 +2545,9 @@ IN_PROC_BROWSER_TEST_F(PolicyTest, FullscreenAllowedApp) {
   // Launch an app that tries to open a fullscreen window.
   TestAddAppWindowObserver add_window_observer(
       extensions::AppWindowRegistry::Get(browser()->profile()));
-  OpenApplication(AppLaunchParams(browser()->profile(), extension,
-                                  extensions::LAUNCH_CONTAINER_NONE, NEW_WINDOW,
-                                  extensions::SOURCE_TEST));
+  OpenApplication(AppLaunchParams(
+      browser()->profile(), extension, extensions::LAUNCH_CONTAINER_NONE,
+      WindowOpenDisposition::NEW_WINDOW, extensions::SOURCE_TEST));
   extensions::AppWindow* window = add_window_observer.WaitForAppWindow();
   ASSERT_TRUE(window);