Remove obsolete UserSettings class

chrome/browser/sync/util/user_settings_posix.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.
-//
-// Implement the storage of service tokens in memory.
-
-#include "chrome/browser/sync/util/user_settings.h"
-
-#include "base/logging.h"
-#include "chrome/browser/password_manager/encryptor.h"
-#include "chrome/browser/sync/util/sqlite_utils.h"
-
-namespace browser_sync {
-
-void UserSettings::SetAuthTokenForService(
-    const std::string& email,
-    const std::string& service_name,
-    const std::string& long_lived_service_token) {
-
-  VLOG(1) << "Saving auth token " << long_lived_service_token
-          << " for " << email << "for service " << service_name;
-
-  std::string encrypted_service_token;
-  if (!Encryptor::EncryptString(long_lived_service_token,
-                                &encrypted_service_token)) {
-    LOG(ERROR) << "Encrytion failed: " << long_lived_service_token;
-    return;
-  }
-  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, encrypted_service_token.data(),
-                         encrypted_service_token.size());
-  if (SQLITE_DONE != statement.step()) {
-    LOG(FATAL) << sqlite3_errmsg(dbhandle.get());
-  }
-}
-
-bool UserSettings::GetLastUserAndServiceToken(const std::string& service_name,
-                                              std::string* username,
-                                              std::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()) {
-    std::string encrypted_service_token;
-    query.column_blob_as_string(1, &encrypted_service_token);
-    if (!Encryptor::DecryptString(encrypted_service_token, service_token)) {
-      LOG(ERROR) << "Decryption failed: " << encrypted_service_token;
-      return false;
-    }
-    *username = query.column_string(0);
-
-    VLOG(1) << "Found service token for:" << *username << " @ " << service_name
-            << " returning: " << *service_token;
-
-    return true;
-  }
-
-  VLOG(1) << "Couldn't find service token for " << service_name;
-
-  return false;
-}
-
-}  // namespace browser_sync