Credential Manager: Reject credential request if an outstanding request is pending.

components/password_manager/content/browser/content_credential_manager_dispatcher.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/password_manager/content/browser/content_credential_manager_dispatcher.h"
 
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/autofill/core/common/password_form.h"
 #include "components/password_manager/content/common/credential_manager_messages.h"
@@ skipping 59 matching lines @@
           web_contents()->GetRenderViewHost()->GetRoutingID(), request_id));
 }
 
 void ContentCredentialManagerDispatcher::OnRequestCredential(
     int request_id,
     bool /* zero_click_only */,
     const std::vector<GURL>& federations) {
   DCHECK(request_id);
   PasswordStore* store = GetPasswordStore();
   if (pending_request_id_ || !store) {
-    // TODO(mkwst): Reject the promise if we can't get to the password store, or
-    // if we're already requesting credentials.
+    web_contents()->GetRenderViewHost()->Send(
+        new CredentialManagerMsg_RejectCredentialRequest(
+            web_contents()->GetRenderViewHost()->GetRoutingID(), request_id));
+    return;
   }
 
   pending_request_id_ = request_id;
 
   autofill::PasswordForm form;
   form.scheme = autofill::PasswordForm::SCHEME_HTML;
   form.origin = web_contents()->GetLastCommittedURL().GetOrigin();
   form.signon_realm = form.origin.spec();
 
   store->GetLogins(form, PasswordStore::DISALLOW_PROMPT, this);
@@ skipping 14 matching lines @@
           pending_request_id_,
           info));
   pending_request_id_ = 0;
 }
 
 PasswordStore* ContentCredentialManagerDispatcher::GetPasswordStore() {
   return client_ ? client_->GetPasswordStore() : nullptr;
 }
 
 }  // namespace password_manager