Fix blacklisting password forms with Credential Manager API.

components/password_manager/core/browser/credential_manager_password_form_manager.cc

Index: components/password_manager/core/browser/credential_manager_password_form_manager.cc
diff --git a/components/password_manager/core/browser/credential_manager_password_form_manager.cc b/components/password_manager/core/browser/credential_manager_password_form_manager.cc
index c1230f724bf2c188cbe2957ae22679f3cbd0a8ef..559c2109e67d37885bf5f1c8bdb5fba563609f97 100644
--- a/components/password_manager/core/browser/credential_manager_password_form_manager.cc
+++ b/components/password_manager/core/browser/credential_manager_password_form_manager.cc
@@ -19,13 +19,16 @@ CredentialManagerPasswordFormManager::CredentialManagerPasswordFormManager(
     PasswordManagerClient* client,
     base::WeakPtr<PasswordManagerDriver> driver,
     const PasswordForm& observed_form,
+    std::unique_ptr<autofill::PasswordForm> saved_form,
     CredentialManagerPasswordFormManagerDelegate* delegate)
     : PasswordFormManager(driver->GetPasswordManager(),
                           client,
                           driver,
                           observed_form,
                           true),
-      delegate_(delegate) {
+      delegate_(delegate),
+      saved_form_(std::move(saved_form)) {
+  DCHECK(saved_form_);
   FetchDataFromPasswordStore();
 }
 
@@ -38,9 +41,8 @@ void CredentialManagerPasswordFormManager::OnGetPasswordStoreResults(
 
   // Mark the form as "preferred", as we've been told by the API that this is
   // indeed the credential set that the user used to sign into the site.
-  PasswordForm provisionally_saved_form(observed_form());
-  provisionally_saved_form.preferred = true;
-  ProvisionallySave(provisionally_saved_form, IGNORE_OTHER_POSSIBLE_USERNAMES);
+  saved_form_->preferred = true;
+  ProvisionallySave(*saved_form_, IGNORE_OTHER_POSSIBLE_USERNAMES);
   delegate_->OnProvisionalSaveComplete();
 }