Convert WindowOpenDisposition to an enum class.

chrome/test/media_router/media_router_integration_browsertest.cc

Index: chrome/test/media_router/media_router_integration_browsertest.cc
diff --git a/chrome/test/media_router/media_router_integration_browsertest.cc b/chrome/test/media_router/media_router_integration_browsertest.cc
index e35d4efb13711ed70bdb670b2ef2b873b3d5f5af..f9e5640cba4e278c8fc7da9ebdaa10f5e0d1a787 100644
--- a/chrome/test/media_router/media_router_integration_browsertest.cc
+++ b/chrome/test/media_router/media_router_integration_browsertest.cc
@@ -152,7 +152,8 @@ void MediaRouterIntegrationBrowserTest::OpenTestPageInNewTab(
     base::FilePath::StringPieceType file_name) {
   base::FilePath full_path = GetResourceFile(file_name);
   ui_test_utils::NavigateToURLWithDisposition(
-      browser(), net::FilePathToFileURL(full_path), NEW_FOREGROUND_TAB,
+      browser(), net::FilePathToFileURL(full_path),
+      WindowOpenDisposition::NEW_FOREGROUND_TAB,
       ui_test_utils::BROWSER_TEST_WAIT_FOR_NAVIGATION);
 }