Rename shell namespace to service_manager

services/service_manager/background/background_shell.h

Index: services/service_manager/background/background_shell.h
diff --git a/services/service_manager/background/background_shell.h b/services/service_manager/background/background_shell.h
index 228eaf5d8d43a8cc0b595385b43da3e6c1f73508..c2a53c92467de928c90a74a7fb6572101dc148e3 100644
--- a/services/service_manager/background/background_shell.h
+++ b/services/service_manager/background/background_shell.h
@@ -17,7 +17,7 @@ namespace catalog {
 class Store;
 }
 
-namespace shell {
+namespace service_manager {
 
 class NativeRunnerDelegate;
 class ServiceManager;
@@ -64,6 +64,6 @@ class BackgroundShell {
   DISALLOW_COPY_AND_ASSIGN(BackgroundShell);
 };
 
-}  // namespace shell
+}  // namespace service_manager
 
 #endif  // SERVICES_SERVICE_MANAGER_BACKGROUND_BACKGROUND_SHELL_H_