[Clean up] Clean up some methods in PasswordManagerClient

components/password_manager/core/browser/stub_password_manager_client.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_CLIENT_H_
 #define COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_STUB_PASSWORD_MANAGER_CLIENT_H_
 
 #include "components/password_manager/core/browser/password_manager_client.h"
 
 namespace password_manager {
@@ skipping 15 matching lines @@
       scoped_ptr<PasswordFormManager> form_to_save) override;
   bool PromptUserToChooseCredentials(
       ScopedVector<autofill::PasswordForm> local_forms,
       ScopedVector<autofill::PasswordForm> federated_forms,
       const GURL& origin,
       base::Callback<void(const password_manager::CredentialInfo&)> callback)
       override;
   void AutomaticPasswordSave(
       scoped_ptr<PasswordFormManager> saved_manager) override;
   PrefService* GetPrefs() override;
-  PasswordStore* GetPasswordStore() override;
+  PasswordStore* GetPasswordStore() const override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(StubPasswordManagerClient);
 };
 
 }  // namespace password_manager
 
 #endif  // COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_STUB_PASSWORD_MANAGER_CLIENT_H_