Mandoline UI Process: Update namespaces and file names

components/mus/public/cpp/args.h

Index: components/mus/public/cpp/args.h
diff --git a/components/mus/public/cpp/args.h b/components/mus/public/cpp/args.h
index a737fd755c14fb5adf31c37657a3601d04e2e219..863bbb5d4c4e54aef9e744bf216aee2287229d5c 100644
--- a/components/mus/public/cpp/args.h
+++ b/components/mus/public/cpp/args.h
@@ -5,13 +5,13 @@
 #ifndef COMPONENTS_MUS_PUBLIC_CPP_ARGS_H_
 #define COMPONENTS_MUS_PUBLIC_CPP_ARGS_H_
 
-namespace mojo {
+namespace mus {
 
 // All args in alphabetical order. The switches should be documented
 // alongside the definition of their values in the .cc file.
 extern const char kUseHeadlessConfig[];
 extern const char kUseX11TestConfig[];
 
-}  // namespace mojo
+}  // namespace mus
 
 #endif  // COMPONENTS_MUS_PUBLIC_CPP_ARGS_H_