Avoid loading the chrome sign-in URLs in incognito

chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc

Index: chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
diff --git a/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc b/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
index 1e46a388594a6fba6f7542de86d2240253021fb8..003c65468276af4e28b3cee70519f1c95bbfebc0 100644
--- a/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
+++ b/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
@@ -535,15 +535,19 @@ WebUIFactoryFunction GetWebUIFactoryFunction(WebUI* web_ui,
     return &NewWebUI<InspectUI>;
 #endif
 #if !defined(OS_CHROMEOS) && !defined(OS_ANDROID)
-  if (url.host_piece() == chrome::kChromeUIChromeSigninHost)
+  if (url.host_piece() == chrome::kChromeUIChromeSigninHost &&
+      !profile->IsOffTheRecord())
     return &NewWebUI<InlineLoginUI>;
   if (url.host_piece() == chrome::kChromeUIMdUserManagerHost)
     return &NewWebUI<MDUserManagerUI>;
-  if (url.host_piece() == chrome::kChromeUISigninErrorHost)
+  if (url.host_piece() == chrome::kChromeUISigninErrorHost &&
+      !profile->IsOffTheRecord())
     return &NewWebUI<SigninErrorUI>;
-  if (url.host_piece() == chrome::kChromeUISyncConfirmationHost)
+  if (url.host_piece() == chrome::kChromeUISyncConfirmationHost &&
+      !profile->IsOffTheRecord())
     return &NewWebUI<SyncConfirmationUI>;
-  if (url.host_piece() == chrome::kChromeUISigninEmailConfirmationHost)
+  if (url.host_piece() == chrome::kChromeUISigninEmailConfirmationHost &&
+      !profile->IsOffTheRecord())
     return &NewWebUI<SigninEmailConfirmationUI>;
   if (url.host_piece() == chrome::kChromeUIWelcomeHost)
     return &NewWebUI<WelcomeUI>;