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