Remove obsolete UserSettings class

chrome/browser/sync/util/user_settings_win.cc

-// Copyright (c) 2011 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/browser/sync/util/user_settings.h"
-
-#include <string>
-
-#include "base/logging.h"
-#include "chrome/browser/sync/util/data_encryption.h"
-#include "chrome/browser/sync/util/sqlite_utils.h"
-
-using std::string;
-
-namespace browser_sync {
-
-void UserSettings::SetAuthTokenForService(const string& email,
-    const string& service_name, const string& long_lived_service_token) {
-  ScopedDBHandle dbhandle(this);
-  sqlite_utils::SQLStatement statement;
-  statement.prepare(dbhandle.get(),
-                    "INSERT INTO cookies "
-                    "(email, service_name, service_token) "
-                    "values (?, ?, ?)");
-  statement.bind_string(0, email);
-  statement.bind_string(1, service_name);
-  statement.bind_blob(2, &EncryptData(long_lived_service_token));
-  if (SQLITE_DONE != statement.step()) {
-    LOG(FATAL) << sqlite3_errmsg(dbhandle.get());
-  }
-}
-
-// Returns the username whose credentials have been persisted as well as
-// a service token for the named service.
-bool UserSettings::GetLastUserAndServiceToken(const string& service_name,
-                                              string* username,
-                                              string* service_token) {
-  ScopedDBHandle dbhandle(this);
-  sqlite_utils::SQLStatement query;
-  query.prepare(dbhandle.get(),
-                "SELECT email, service_token FROM cookies"
-                " WHERE service_name = ?");
-  query.bind_string(0, service_name.c_str());
-
-  if (SQLITE_ROW == query.step()) {
-    *username = query.column_string(0);
-
-    std::vector<uint8> encrypted_service_token;
-    query.column_blob_as_vector(1, &encrypted_service_token);
-    DecryptData(encrypted_service_token, service_token);
-    return true;
-  }
-
-  return false;
-}
-
-}  // namespace browser_sync