Refactor CredentialManagerImpl::RequireUserMediation method.

ios/chrome/browser/passwords/credential_manager.mm

 // Copyright 2015 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.
 
 #import "ios/chrome/browser/passwords/credential_manager.h"
 
 #include <utility>
 
 #import "base/ios/weak_nsobject.h"
 #include "base/mac/bind_objc_block.h"
@@ skipping 210 matching lines @@
     return;
   }
 
   // The user signed out of the current page, so future zero-click credential
   // requests for this page should fail: otherwise, the next time the user
   // visits the page, if zero-click requests succeeded, the user might be auto-
   // signed-in again with the credential that they just signed out. Forward this
   // information to the PasswordStore via an asynchronous task.
   password_manager::PasswordStore* store = GetPasswordStore();
   if (store) {
-    // Bundle the origins that are sent to the PasswordStore if the task hasn't
-    // yet resolved. This task lives across page-loads to enable this bundling.
-    if (pending_require_user_mediation_) {
-      pending_require_user_mediation_->AddOrigin(page_url);
-    } else {
+    if (!pending_require_user_mediation_) {
       pending_require_user_mediation_.reset(
           new password_manager::
-              CredentialManagerPendingRequireUserMediationTask(
-                  this, page_url, std::vector<std::string>()));
-
-      // This will result in a callback to
-      // CredentialManagerPendingSignedOutTask::OnGetPasswordStoreResults().
-      store->GetAutofillableLogins(pending_require_user_mediation_.get());
+              CredentialManagerPendingRequireUserMediationTask(this));
     }
+    password_manager::PasswordStore::FormDigest form = {
+        autofill::PasswordForm::SCHEME_HTML, source_url.spec(), source_url};
+    pending_require_user_mediation_->AddOrigin(form);
   }
 
   // Acknowledge the page's signOut notification without waiting for the
   // PasswordStore interaction to complete. The implementation of the sign-out
   // notification isn't the page's concern.
   ResolvePromise(request_id);
 }
 
 void CredentialManager::WebStateDestroyed() {
   // When the WebState is destroyed, clean up everything that depends on it.
@@ skipping 121 matching lines @@
 bool CredentialManager::GetUrlWithAbsoluteTrust(GURL* page_url) {
   web::URLVerificationTrustLevel trust_level =
       web::URLVerificationTrustLevel::kNone;
   const GURL possibly_untrusted_url(web_state()->GetCurrentURL(&trust_level));
   if (trust_level == web::URLVerificationTrustLevel::kAbsolute) {
     *page_url = possibly_untrusted_url;
     return true;
   }
   return false;
 }