Suppress the autofill password manager after a credential was saved via the API.

chrome/browser/password_manager/chrome_password_manager_client.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 "chrome/browser/password_manager/chrome_password_manager_client.h"
 
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 204 matching lines @@
     std::unique_ptr<password_manager::PasswordFormManager> form_to_save,
     password_manager::CredentialSourceType type,
     bool update_password) {
   // Save password infobar and the password bubble prompts in case of
   // "webby" URLs and do not prompt in case of "non-webby" URLS (e.g. file://).
   if (!BrowsingDataHelper::IsWebScheme(
       web_contents()->GetLastCommittedURL().scheme())) {
     return false;
   }
 
+  // Prevent the autofill password manager from prompting the second time.
+  if (type == password_manager::CredentialSourceType::CREDENTIAL_SOURCE_API)
+    password_manager_.DropFormManagers();
+
   if (IsTheHotNewBubbleUIEnabled()) {
 #if !BUILDFLAG(ANDROID_JAVA_UI)
     PasswordsClientUIDelegate* manage_passwords_ui_controller =
         PasswordsClientUIDelegateFromWebContents(web_contents());
     if (update_password && IsUpdatePasswordUIEnabled()) {
       manage_passwords_ui_controller->OnUpdatePasswordSubmitted(
           std::move(form_to_save));
     } else {
       manage_passwords_ui_controller->OnPasswordSubmitted(
           std::move(form_to_save));
@@ skipping 382 matching lines @@
     password_manager::mojom::CredentialManagerRequest request) {
   content::WebContents* web_contents =
       content::WebContents::FromRenderFrameHost(render_frame_host);
   DCHECK(web_contents);
 
   ChromePasswordManagerClient* instance =
       ChromePasswordManagerClient::FromWebContents(web_contents);
   DCHECK(instance);
   instance->credential_manager_impl_.BindRequest(std::move(request));
 }