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 224ac18ecded85096143a3c1a50c0fded7d126f7..51f3c44640ac1bc5511379bec6ab1b48a599ba49 100644
--- a/chrome/browser/ui/webui/signin/inline_login_handler_impl.cc
+++ b/chrome/browser/ui/webui/signin/inline_login_handler_impl.cc
@@ -228,11 +228,13 @@ 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;
+    }
   }
 }