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

components/password_manager/core/browser/stub_password_manager_driver.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 COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_STUB_PASSWORD_MANAGER_DRIVER_H_
 #define COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_STUB_PASSWORD_MANAGER_DRIVER_H_
 
 #include "components/password_manager/core/browser/password_manager_driver.h"
 
 namespace password_manager {
@@ skipping 10 matching lines @@
   void FillPasswordForm(
       const autofill::PasswordFormFillData& form_data) override;
   void AllowPasswordGenerationForForm(
       const autofill::PasswordForm& form) override;
   void AccountCreationFormsFound(
       const std::vector<autofill::FormData>& forms) override;
   void GeneratedPasswordAccepted(const base::string16& password) override;
   void FillSuggestion(const base::string16& username,
                       const base::string16& password) override;
   void PreviewSuggestion(const base::string16& username,
-                         const base::string16& password) override;
+                         const base::string16& password,
+                         size_t match_start) override;
   void ClearPreviewedForm() override;
   PasswordGenerationManager* GetPasswordGenerationManager() override;
   PasswordManager* GetPasswordManager() override;
   PasswordAutofillManager* GetPasswordAutofillManager() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(StubPasswordManagerDriver);
 };
 
 }  // namespace password_manager
 
 #endif  // COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_STUB_PASSWORD_MANAGER_DRIVER_H_