Added key-value storage for pending changes to OwnerSettingsServiceChromeOS.

chrome/browser/chromeos/settings/device_settings_provider.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_SETTINGS_DEVICE_SETTINGS_PROVIDER_H_
 #define CHROME_BROWSER_CHROMEOS_SETTINGS_DEVICE_SETTINGS_PROVIDER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 47 matching lines @@
   // CrosSettingsProvider implementation:
   virtual void DoSet(const std::string& path,
                      const base::Value& value) override;
 
   // DeviceSettingsService::Observer implementation:
   virtual void OwnershipStatusChanged() override;
   virtual void DeviceSettingsUpdated() override;
   virtual void OnDeviceSettingsServiceShutdown() override;
 
   // ownership::OwnerSettingsService::Observer implementation:
-  virtual void OnTentativeChangesInPolicy(
-      const enterprise_management::PolicyData& policy_data) override;
+  virtual void OnTentativeChangeInSettings(const std::string& setting,
+                                           const base::Value& value) override;
 
   // Populates in-memory cache from the local_state cache that is used to store
   // device settings before the device is owned and to speed up policy
   // availability before the policy blob is fetched on boot.
   void RetrieveCachedData();
 
   // Parses the policy data and fills in |values_cache_|.
   void UpdateValuesCache(
       const enterprise_management::PolicyData& policy_data,
       const enterprise_management::ChromeDeviceSettingsProto& settings,
@@ skipping 66 matching lines @@
                            InitializationTestUnowned);
   FRIEND_TEST_ALL_PREFIXES(DeviceSettingsProviderTest,
                            PolicyFailedPermanentlyNotification);
   FRIEND_TEST_ALL_PREFIXES(DeviceSettingsProviderTest, PolicyLoadNotification);
   DISALLOW_COPY_AND_ASSIGN(DeviceSettingsProvider);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_SETTINGS_DEVICE_SETTINGS_PROVIDER_H_