Revert "[CUPS] Fix the browser crash in CUPS settings UI in guest mode."

chrome/browser/chromeos/printing/printer_pref_manager_factory.cc

Index: chrome/browser/chromeos/printing/printer_pref_manager_factory.cc
diff --git a/chrome/browser/chromeos/printing/printer_pref_manager_factory.cc b/chrome/browser/chromeos/printing/printer_pref_manager_factory.cc
index 4f082568fd3ece4c71b3ffdd568682ae72577845..7baed0e10c8e2c1ce8684abb205ad74b804526e6 100644
--- a/chrome/browser/chromeos/printing/printer_pref_manager_factory.cc
+++ b/chrome/browser/chromeos/printing/printer_pref_manager_factory.cc
@@ -21,7 +21,6 @@ base::LazyInstance<PrinterPrefManagerFactory> g_printer_pref_manager =
 // static
 PrinterPrefManager* PrinterPrefManagerFactory::GetForBrowserContext(
     content::BrowserContext* context) {
-  DCHECK(!context->IsOffTheRecord());
   return static_cast<PrinterPrefManager*>(
       GetInstance()->GetServiceForBrowserContext(context, true));
 }