[M57] Eliminate PasswordAutofillAgentConstructed() in mojo interface PasswordManagerDriver

chrome/renderer/autofill/fake_content_password_manager_driver.cc

 // Copyright 2016 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/renderer/autofill/fake_content_password_manager_driver.h"
 
 FakeContentPasswordManagerDriver::FakeContentPasswordManagerDriver() {}
 
 FakeContentPasswordManagerDriver::~FakeContentPasswordManagerDriver() {}
 
@@ skipping 46 matching lines @@
   show_pw_suggestions_username_ = typed_username;
   show_pw_suggestions_options_ = options;
 }
 
 void FakeContentPasswordManagerDriver::ShowNotSecureWarning(
     base::i18n::TextDirection text_direction,
     const gfx::RectF& bounds) {
   called_show_not_secure_warning_ = true;
 }
 
-void FakeContentPasswordManagerDriver::PasswordAutofillAgentConstructed() {
-  called_agent_constructed_ = true;
-}
-
 void FakeContentPasswordManagerDriver::RecordSavePasswordProgress(
     const std::string& log) {
   called_record_save_progress_ = true;
 }
 
 void FakeContentPasswordManagerDriver::SaveGenerationFieldDetectedByClassifier(
     const autofill::PasswordForm& password_form,
     const base::string16& generation_field) {
   called_save_generation_field_ = true;
   save_generation_field_ = generation_field;
 }