Mandoline UI Process: Update namespaces and file names

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

Index: components/mus/public/cpp/lib/args.cc
diff --git a/components/mus/public/cpp/lib/args.cc b/components/mus/public/cpp/lib/args.cc
index d23478be7d24e0026c183244f054e3f917227889..e17ada37d58212810eec1acc2d54801e9fde0474 100644
--- a/components/mus/public/cpp/lib/args.cc
+++ b/components/mus/public/cpp/lib/args.cc
@@ -4,7 +4,7 @@
 
 #include "components/mus/public/cpp/args.h"
 
-namespace mojo {
+namespace mus {
 
 // Create native viewport in headless mode.
 const char kUseHeadlessConfig[] = "use-headless-config";
@@ -13,4 +13,4 @@ const char kUseHeadlessConfig[] = "use-headless-config";
 // creating X11 windows.
 const char kUseX11TestConfig[] = "use-x11-test-config";
 
-}  // namespace mojo
+}  // namespace mus