Fix loading success.html at the end of chrome://chrome-signin flow

extensions/browser/url_request_util.cc

Index: extensions/browser/url_request_util.cc
diff --git a/extensions/browser/url_request_util.cc b/extensions/browser/url_request_util.cc
index 20e32c61b77d19208bb7ce156c7bc4a895d2415c..a51a42720cf478d613abc4c5dbb161814bf8ffe5 100644
--- a/extensions/browser/url_request_util.cc
+++ b/extensions/browser/url_request_util.cc
@@ -156,12 +156,22 @@ bool AllowCrossRendererResourceLoadHelper(bool is_guest,
     // An extension's resources should only be accessible to WebViews owned by
     // that extension.
     if (owner_extension != extension) {
-      *allowed = false;
-      return true;
+      bool is_signin_extension =
+          extension && extension->id() == "mfffpogegjflfpflabcdkioaeobkgjik";
+      if (!is_signin_extension) {
+        LOG(ERROR) << "NOT Allowed ";
+        *allowed = false;
+        return true;
+      } else {
+        LOG(ERROR)
+            << "Sign-in extension is allowed to load cross renderrer resouces";
+      }
     }
 
     *allowed = WebviewInfo::IsResourceWebviewAccessible(extension, partition_id,
                                                         resource_path);
+    LOG(ERROR) << "Allowed? " << extension->id() << " to load " << resource_path
+               << ":" << *allowed;
     return true;
   }