Fix non-otr profile's file manager being launched in guest mode.

chrome/browser/ui/app_list/app_list_syncable_service.cc

Index: chrome/browser/ui/app_list/app_list_syncable_service.cc
diff --git a/chrome/browser/ui/app_list/app_list_syncable_service.cc b/chrome/browser/ui/app_list/app_list_syncable_service.cc
index 1288b42b6fdef3d86394066012008a67d59f3e85..e3a5e065843e6d4323805ba671c38d088fe10afe 100644
--- a/chrome/browser/ui/app_list/app_list_syncable_service.cc
+++ b/chrome/browser/ui/app_list/app_list_syncable_service.cc
@@ -121,7 +121,10 @@ void AppListSyncableService::BuildModel() {
   if (service)
     controller = service->GetControllerDelegate();
   apps_builder_.reset(new ExtensionAppModelBuilder(controller));
-  if (CommandLine::ForCurrentProcess()->HasSwitch(
+  DCHECK(profile_);
+  // TODO(stevenjb): Correctly handle OTR profiles for Guest mode.
+  if (!profile_->IsOffTheRecord() &&
+      CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kEnableSyncAppList)) {
     DVLOG(1) << this << ": AppListSyncableService: InitializeWithService.";
     SyncStarted();
@@ -130,8 +133,6 @@ void AppListSyncableService::BuildModel() {
     DVLOG(1) << this << ": AppListSyncableService: InitializeWithProfile.";
     apps_builder_->InitializeWithProfile(profile_, model_.get());
   }
-
-  DCHECK(profile_);
 }
 
 void AppListSyncableService::Observe(