Mandoline UI Process: Update namespaces and file names

components/mus/surfaces/surfaces_output_surface.cc

Index: components/mus/surfaces/surfaces_output_surface.cc
diff --git a/components/mus/surfaces/surfaces_output_surface.cc b/components/mus/surfaces/surfaces_output_surface.cc
index 63053a4dd7255bc71355438581cbbd667d24be4c..46ccdb646e1f4f64c4c8d7c0954416d762baf909 100644
--- a/components/mus/surfaces/surfaces_output_surface.cc
+++ b/components/mus/surfaces/surfaces_output_surface.cc
@@ -11,7 +11,7 @@
 #include "gpu/command_buffer/client/context_support.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 
-namespace surfaces {
+namespace mus {
 
 DirectOutputSurface::DirectOutputSurface(
     const scoped_refptr<cc::ContextProvider>& context_provider)
@@ -37,4 +37,4 @@ void DirectOutputSurface::SwapBuffers(cc::CompositorFrame* frame) {
   client_->DidSwapBuffers();
 }
 
-}  // namespace surfaces
+}  // namespace mus