Revert 154457 - Switch from SignedSettings to DeviceSettingsService.

chrome/browser/chromeos/settings/device_settings_cache.cc

-// Copyright (c) 2012 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/chromeos/settings/device_settings_cache.h"
-
-#include <string>
-
-#include "base/base64.h"
-#include "base/bind.h"
-#include "chrome/browser/chromeos/settings/cros_settings.h"
-#include "chrome/browser/policy/proto/device_management_backend.pb.h"
-#include "chrome/browser/prefs/pref_service.h"
-#include "chrome/common/pref_names.h"
-
-namespace em = enterprise_management;
-
-namespace chromeos {
-
-namespace device_settings_cache {
-
-void RegisterPrefs(PrefService* local_state) {
-  local_state->RegisterStringPref(prefs::kDeviceSettingsCache,
-                                  "invalid",
-                                  PrefService::UNSYNCABLE_PREF);
-}
-
-bool Store(const em::PolicyData& policy, PrefService* local_state) {
-  if (local_state) {
-    std::string policy_string = policy.SerializeAsString();
-    std::string encoded;
-    if (!base::Base64Encode(policy_string, &encoded)) {
-      LOG(ERROR) << "Can't encode policy in base64.";
-      return false;
-    }
-    local_state->SetString(prefs::kDeviceSettingsCache, encoded);
-    return true;
-  }
-  return false;
-}
-
-bool Retrieve(em::PolicyData *policy, PrefService* local_state) {
-  if (local_state) {
-    std::string encoded =
-        local_state->GetString(prefs::kDeviceSettingsCache);
-    std::string policy_string;
-    if (!base::Base64Decode(encoded, &policy_string)) {
-      // This is normal and happens on first boot.
-      VLOG(1) << "Can't decode policy from base64.";
-      return false;
-    }
-    return policy->ParseFromString(policy_string);
-  }
-  return false;
-}
-
-}  // namespace device_settings_cache
-
-}  // namespace chromeos