Convert WindowOpenDisposition to an enum class.

chrome/browser/extensions/extension_apitest.cc

Index: chrome/browser/extensions/extension_apitest.cc
diff --git a/chrome/browser/extensions/extension_apitest.cc b/chrome/browser/extensions/extension_apitest.cc
index 2f14cddaf51e95edf8023fa37c984a0610dc1635..177ac9bc117431ea5a884de1bb94b9a322ef4f41 100644
--- a/chrome/browser/extensions/extension_apitest.cc
+++ b/chrome/browser/extensions/extension_apitest.cc
@@ -340,9 +340,9 @@ bool ExtensionApiTest::RunExtensionTestImpl(const std::string& extension_name,
     else
       ui_test_utils::NavigateToURL(browser(), url);
   } else if (launch_platform_app) {
-    AppLaunchParams params(browser()->profile(), extension,
-                           extensions::LAUNCH_CONTAINER_NONE, NEW_WINDOW,
-                           extensions::SOURCE_TEST);
+    AppLaunchParams params(
+        browser()->profile(), extension, extensions::LAUNCH_CONTAINER_NONE,
+        WindowOpenDisposition::NEW_WINDOW, extensions::SOURCE_TEST);
     params.command_line = *base::CommandLine::ForCurrentProcess();
     OpenApplication(params);
   }