Implement CredentialsContainer::create

third_party/WebKit/LayoutTests/external/wpt/credential-management/idl.https.html

Index: third_party/WebKit/LayoutTests/external/wpt/credential-management/idl.https.html
diff --git a/third_party/WebKit/LayoutTests/external/wpt/credential-management/idl.https.html b/third_party/WebKit/LayoutTests/external/wpt/credential-management/idl.https.html
index 5ccc0c987a2c29a4c0e3e3f7967b44d202277e2b..f2c747a4436a3713b053d0ccea4d838bb232be38 100644
--- a/third_party/WebKit/LayoutTests/external/wpt/credential-management/idl.https.html
+++ b/third_party/WebKit/LayoutTests/external/wpt/credential-management/idl.https.html
@@ -26,6 +26,8 @@
       required USVString password;
     };
 
+    typedef (PasswordCredentialData or HTMLFormElement) PasswordCredentialInit;
+
     typedef (FormData or URLSearchParams) CredentialBodyType;
 
 
@@ -36,6 +38,11 @@
       DOMString protocol;
     };
 
+    dictionary CredentialCreationOptions {
+      PasswordCredentialInit? password;
+      FederatedCredentialInit? federated;
+    };
+
     dictionary CredentialRequestOptions {
       boolean password = false;
       FederatedCredentialRequestOptions federated;
@@ -53,6 +60,7 @@
     interface CredentialsContainer {
       Promise<Credential> get(optional CredentialRequestOptions options);
       Promise<Credential> store(Credential credential);
+      Promise<Credential?> create(optional CredentialCreationOptions options);
       Promise<void> requireUserMediation();
     };