Update ManagedUserService tests to create the service using ManagedUserServiceFactory

chrome/browser/managed_mode/managed_user_service.cc

Index: chrome/browser/managed_mode/managed_user_service.cc
diff --git a/chrome/browser/managed_mode/managed_user_service.cc b/chrome/browser/managed_mode/managed_user_service.cc
index 4f46157df789c21dc4203543eab53cc20441e1da..967f36e79acc9f32c5849722209bbf8657869dd4 100644
--- a/chrome/browser/managed_mode/managed_user_service.cc
+++ b/chrome/browser/managed_mode/managed_user_service.cc
@@ -140,12 +140,16 @@ ManagedUserService::ManagedUserService(Profile* profile)
     : weak_ptr_factory_(this),
       profile_(profile),
       waiting_for_sync_initialization_(false),
-      elevated_for_testing_(false) {
+      elevated_for_testing_(false),
+      did_shutdown_(false) {
 }
 
-ManagedUserService::~ManagedUserService() {}
+ManagedUserService::~ManagedUserService() {
+  DCHECK(did_shutdown_);
+}
 
 void ManagedUserService::Shutdown() {
+  did_shutdown_ = true;
   if (!waiting_for_sync_initialization_)
     return;