Always call into the embedder for password autofill auth if password uses it.

chrome/browser/android/password_authentication_manager.h

 // 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.
 
 #ifndef CHROME_BROWSER_ANDROID_PASSWORD_AUTHENTICATION_MANAGER_H_
 #define CHROME_BROWSER_ANDROID_PASSWORD_AUTHENTICATION_MANAGER_H_
 
 #include "base/android/jni_android.h"
 #include "base/callback.h"
 #include "components/autofill/core/common/password_form_fill_data.h"
 
 namespace content {
 class WebContents;
 }
 
 // Manager for authenticating the use of stored passwords.
 class PasswordAuthenticationManager {
  public:
   // JNI registration
   static bool RegisterPasswordAuthenticationManager(JNIEnv* env);
 
-  // Whether authenticating autofill passwords is currently enabled by the OS.
-  static bool IsAutofillPasswordAuthenticationEnabled();
-
   // Request an authentication challenge for the specified webcontents to allow
   // password autofill.  If the authentication is successful, run the
   // |success_callback|.
   static void AuthenticatePasswordAutofill(
       content::WebContents* web_contents,
       const base::Closure& success_callback);
 
  private:
   PasswordAuthenticationManager();
   ~PasswordAuthenticationManager();
 
   DISALLOW_COPY_AND_ASSIGN(PasswordAuthenticationManager);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_PASSWORD_AUTHENTICATION_MANAGER_H_