Fix blacklisting password forms with Credential Manager API.

ios/chrome/browser/passwords/credential_manager.mm

Index: ios/chrome/browser/passwords/credential_manager.mm
diff --git a/ios/chrome/browser/passwords/credential_manager.mm b/ios/chrome/browser/passwords/credential_manager.mm
index b1e86fd1577e59f9cb4411ceb458010cc16f3555..1cd453bfe27a4a3775a5aab18a1342d04c0f9b69 100644
--- a/ios/chrome/browser/passwords/credential_manager.mm
+++ b/ios/chrome/browser/passwords/credential_manager.mm
@@ -204,7 +204,9 @@ void CredentialManager::SignedIn(int request_id,
   // accordingly.
   form_manager_.reset(
       new password_manager::CredentialManagerPasswordFormManager(
-          client_, driver_->AsWeakPtr(), *form, this));
+          client_, driver_->AsWeakPtr(),
+          *password_manager::CreateObservedPasswordFormFromOrigin(page_url),
+          std::move(form), this));
 }
 
 void CredentialManager::SignedOut(int request_id, const GURL& source_url) {