CREDENTIAL: Convert federations from URLs to origins throughout.

ios/web/public/web_state/credential.h

Index: ios/web/public/web_state/credential.h
diff --git a/ios/web/public/web_state/credential.h b/ios/web/public/web_state/credential.h
index 5b133692585a5f8000405911ecd915f07c842b29..8fc850e98ea5b10f30a1e19cb5a7254cb3e81d79 100644
--- a/ios/web/public/web_state/credential.h
+++ b/ios/web/public/web_state/credential.h
@@ -7,6 +7,7 @@
 
 #include "base/strings/string16.h"
 #include "url/gurl.h"
+#include "url/origin.h"
 
 namespace web {
 
@@ -39,7 +40,7 @@ struct Credential {
   base::string16 password;
 
   // The federation URL for a federated credential.
-  GURL federation_url;
+  url::Origin federation_origin;
 };
 
 // Determines whether two credentials are equal.