Implemented OwnerSettingsService::Set() method.

chrome/browser/chromeos/ownership/owner_settings_service_chromeos.h

 // Copyright 2014 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_OWNERSHIP_OWNER_SETTINGS_SERVICE_CHROMEOS_H_
 #define CHROME_BROWSER_CHROMEOS_OWNERSHIP_OWNER_SETTINGS_SERVICE_CHROMEOS_H_
 
-#include <deque>
+#include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
-#include "base/compiler_specific.h"
 #include "base/macros.h"
+#include "chrome/browser/chromeos/policy/proto/chrome_device_policy.pb.h"
 #include "chrome/browser/chromeos/settings/device_settings_service.h"
 #include "chromeos/dbus/session_manager_client.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "components/ownership/owner_key_util.h"
 #include "components/ownership/owner_settings_service.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
 class Profile;
 
 namespace ownership {
 class OwnerKeyUtil;
 }
 
 namespace chromeos {
 
-class SessionManagerOperation;
-
 // The class is a profile-keyed service which holds public/private
 // keypair corresponds to a profile. The keypair is reloaded automatically when
 // profile is created and TPM token is ready. Note that the private part of a
 // key can be loaded only for the owner.
 //
 // TODO (ygorshenin@): move write path for device settings here
 // (crbug.com/230018).
 class OwnerSettingsServiceChromeOS : public ownership::OwnerSettingsService,
                                      public content::NotificationObserver,
-                                     public SessionManagerClient::Observer {
+                                     public SessionManagerClient::Observer,
+                                     public DeviceSettingsService::Observer {
  public:
   virtual ~OwnerSettingsServiceChromeOS();
 
   void OnTPMTokenReady(bool tpm_token_enabled);
 
   // ownership::OwnerSettingsService implementation:
-  virtual void SignAndStorePolicyAsync(
-      scoped_ptr<enterprise_management::PolicyData> policy,
-      const base::Closure& callback) override;
+  virtual bool HandlesSetting(const std::string& setting) override;
+  virtual bool Set(const std::string& setting,
+                   const base::Value& value) override;
+  virtual bool CommitTentativeDeviceSettings(
+      scoped_ptr<enterprise_management::PolicyData> policy) override;
 
   // NotificationObserver implementation:
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) override;
 
   // SessionManagerClient::Observer:
   virtual void OwnerKeySet(bool success) override;
 
+  // DeviceSettingsService::Observer:
+  virtual void OwnershipStatusChanged() override;
+  virtual void DeviceSettingsUpdated() override;
+  virtual void OnDeviceSettingsServiceShutdown() override;
+
   // Checks if the user is the device owner, without the user profile having to
   // been initialized. Should be used only if login state is in safe mode.
   static void IsOwnerForSafeModeAsync(
       const std::string& user_hash,
       const scoped_refptr<ownership::OwnerKeyUtil>& owner_key_util,
       const IsOwnerCallback& callback);
 
-  static void SetDeviceSettingsServiceForTesting(
-      DeviceSettingsService* device_settings_service);
+  // Assembles PolicyData based on |settings|, |policy_data| and
+  // |user_id|.
+  static scoped_ptr<enterprise_management::PolicyData> AssemblePolicy(
+      const std::string& user_id,
+      const enterprise_management::PolicyData* policy_data,
+      const enterprise_management::ChromeDeviceSettingsProto* settings);
+
+  // Updates device |settings|.
+  static void UpdateDeviceSettings(
+      const std::string& path,
+      const base::Value& value,
+      enterprise_management::ChromeDeviceSettingsProto& settings);
+
+  bool has_pending_changes() const { return has_pending_changes_; }
 
  private:
   friend class OwnerSettingsServiceChromeOSFactory;
 
   OwnerSettingsServiceChromeOS(
+      DeviceSettingsService* device_settings_service,
       Profile* profile,
       const scoped_refptr<ownership::OwnerKeyUtil>& owner_key_util);
 
   // OwnerSettingsService protected interface overrides:
 
   // Reloads private key from profile's NSS slots, responds via |callback|.
   virtual void ReloadKeypairImpl(const base::Callback<
       void(const scoped_refptr<ownership::PublicKey>& public_key,
            const scoped_refptr<ownership::PrivateKey>& private_key)>& callback)
       override;
 
   // Possibly notifies DeviceSettingsService that owner's keypair is loaded.
   virtual void OnPostKeypairLoadedActions() override;
 
-  // Performs next operation in the queue.
-  void StartNextOperation();
+  // Tries to sign store current device settings if there're pending
+  // changes in device settings and no active previous call to
+  // DeviceSettingsService::Store().
+  void StoreDeviceSettings();
 
-  // Called when sign-and-store operation completes it's work.
-  void HandleCompletedOperation(const base::Closure& callback,
-                                SessionManagerOperation* operation,
-                                DeviceSettingsService::Status status);
+  // Called when current device settings are successfully signed.
+  // Sends signed settings for storage.
+  void OnPolicyAssembledAndSigned(
+      scoped_ptr<enterprise_management::PolicyFetchResponse> policy_response);
+
+  // Called by DeviceSettingsService when modified and signed device
+  // settings are stored. Notifies observers and tries to store device
+  // settings again.
+  void OnSignedPolicyStored(bool success);
+
+  // Fetches device settings from DeviceSettingsService and merges
+  // them with local device settings.
+  bool UpdateFromService();
+
+  DeviceSettingsService* device_settings_service_;
 
   // Profile this service instance belongs to.
   Profile* profile_;
 
   // User ID this service instance belongs to.
   std::string user_id_;
 
   // Whether profile still needs to be initialized.
   bool waiting_for_profile_creation_;
 
   // Whether TPM token still needs to be initialized.
   bool waiting_for_tpm_token_;
 
-  // The queue of pending sign-and-store operations. The first operation on the
-  // queue is currently active; it gets removed and destroyed once it completes.
-  std::deque<SessionManagerOperation*> pending_operations_;
+  // The device settings.  This may be different from the actual
+  // current device settings (which can be obtained from
+  // DeviceSettingsService) in case the device does not have an owner
+  // yet or there are pending changes that have not yet been written
+  // to session_manager.
+  enterprise_management::ChromeDeviceSettingsProto device_settings_;
+
+  // True if some settings were changed but not stored.
+  bool has_pending_changes_;
 
   content::NotificationRegistrar registrar_;
 
   base::WeakPtrFactory<OwnerSettingsServiceChromeOS> weak_factory_;
 
+  base::WeakPtrFactory<OwnerSettingsServiceChromeOS> store_settings_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(OwnerSettingsServiceChromeOS);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_OWNERSHIP_OWNER_SETTINGS_SERVICE_CHROMEOS_H_