Rename shell namespace to service_manager

services/service_manager/standalone/tracer.cc

Index: services/service_manager/standalone/tracer.cc
diff --git a/services/service_manager/standalone/tracer.cc b/services/service_manager/standalone/tracer.cc
index e26f2cfd1aa6d1ce978a763876fa0f439720beba..0fa74a33fba5cfee5f4850ffdac0817ccf915109 100644
--- a/services/service_manager/standalone/tracer.cc
+++ b/services/service_manager/standalone/tracer.cc
@@ -18,7 +18,7 @@
 #include "base/trace_event/trace_config.h"
 #include "base/trace_event/trace_event.h"
 
-namespace shell {
+namespace service_manager {
 
 Tracer::Tracer()
     : tracing_(false), first_chunk_written_(false), trace_file_(nullptr) {}
@@ -162,4 +162,4 @@ void Tracer::WriteCommaIfNeeded() {
   first_chunk_written_ = true;
 }
 
-}  // namespace shell
+}  // namespace service_manager