view-manager: Fix some issues regarding running tests in x11.

components/view_manager/public/cpp/lib/args.cc

Index: components/view_manager/public/cpp/lib/args.cc
diff --git a/components/view_manager/public/cpp/lib/args.cc b/components/view_manager/public/cpp/lib/args.cc
index d5391b8f7e6bd47e12b60bad1ba9d3147714a64a..ed4f7a9120b8b66fb7a8a9226392837671185ba6 100644
--- a/components/view_manager/public/cpp/lib/args.cc
+++ b/components/view_manager/public/cpp/lib/args.cc
@@ -8,7 +8,9 @@ namespace mojo {
 
 // Create native viewport in headless mode.
 const char kUseHeadlessConfig[] = "use-headless-config";
-// Force gl to be initialized in test mode.
-const char kUseTestConfig[] = "use-test-config";
+
+// Initializes X11 in threaded mode, and sets the |override_redirect| flag when
+// creating X11 windows.
+const char kUseX11TestConfig[] = "use-x11-test-config";
 
 }  // namespace mojo