Add test for showing confirmation dialog for unsecure signin

chrome/browser/ui/webui/signin/inline_login_handler_impl.cc

Index: chrome/browser/ui/webui/signin/inline_login_handler_impl.cc
diff --git a/chrome/browser/ui/webui/signin/inline_login_handler_impl.cc b/chrome/browser/ui/webui/signin/inline_login_handler_impl.cc
index a805bd119831e59558d60c81b1b43f6a6812efff..b4890b2f40899f6725840d5c80819f8fd3528b76 100644
--- a/chrome/browser/ui/webui/signin/inline_login_handler_impl.cc
+++ b/chrome/browser/ui/webui/signin/inline_login_handler_impl.cc
@@ -254,11 +254,13 @@ void InlineLoginHandlerImpl::DidCommitProvisionalLoadForFrame(
 
   // Loading any untrusted (e.g., HTTP) URLs in the privileged sign-in process
   // will require confirmation before the sign in takes effect.
-  if (!url.is_empty() &&
-      url.spec() != url::kAboutBlankURL &&
-      !gaia::IsGaiaSignonRealm(url.GetOrigin()) &&
-      !signin::IsContinueUrlForWebBasedSigninFlow(url)) {
-    confirm_untrusted_signin_ = true;
+  if (!url.is_empty()) {
+    GURL origin(url.GetOrigin());
+    if (url.spec() != url::kAboutBlankURL &&
+        origin != kGaiaExtOrigin &&
+        !gaia::IsGaiaSignonRealm(origin)) {
+      confirm_untrusted_signin_ = true;
+    }
   }
 }