[Autofill/Autocomplete Feature] Substring matching instead of prefix matching.

components/password_manager/core/browser/stub_password_manager_driver.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 "components/password_manager/core/browser/stub_password_manager_driver.h"
 
 namespace password_manager {
 
 StubPasswordManagerDriver::StubPasswordManagerDriver() {
 }
@@ skipping 16 matching lines @@
 void StubPasswordManagerDriver::GeneratedPasswordAccepted(
     const base::string16& password) {
 }
 
 void StubPasswordManagerDriver::FillSuggestion(const base::string16& username,
                                                const base::string16& password) {
 }
 
 void StubPasswordManagerDriver::PreviewSuggestion(
     const base::string16& username,
-    const base::string16& password) {
+    const base::string16& password,
+    size_t match_start) {
 }
 
 void StubPasswordManagerDriver::ClearPreviewedForm() {
 }
 
 PasswordGenerationManager*
 StubPasswordManagerDriver::GetPasswordGenerationManager() {
   return nullptr;
 }
 
 PasswordManager* StubPasswordManagerDriver::GetPasswordManager() {
   return nullptr;
 }
 
 PasswordAutofillManager*
 StubPasswordManagerDriver::GetPasswordAutofillManager() {
   return nullptr;
 }
 
 }  // namespace password_manager