Revert of Implemented OwnerSettingsService::Set() method.

chrome/browser/chromeos/settings/device_settings_provider.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_provider.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
-#include "chrome/browser/chromeos/ownership/owner_settings_service_chromeos.h"
 #include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h"
 #include "chrome/browser/chromeos/policy/device_local_account.h"
 #include "chrome/browser/chromeos/policy/enterprise_install_attributes.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "chrome/browser/chromeos/settings/device_settings_cache.h"
 #include "chrome/browser/metrics/metrics_reporting_state.h"
 #include "chrome/installer/util/google_update_settings.h"
 #include "chromeos/chromeos_switches.h"
 #include "chromeos/dbus/cryptohome_client.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
@@ skipping 416 matching lines @@
       ownership_status_(device_settings_service_->GetOwnershipStatus()),
       store_callback_factory_(this) {
   device_settings_service_->AddObserver(this);
   if (!UpdateFromService()) {
     // Make sure we have at least the cache data immediately.
     RetrieveCachedData();
   }
 }
 
 DeviceSettingsProvider::~DeviceSettingsProvider() {
-  if (device_settings_service_->GetOwnerSettingsService())
-    device_settings_service_->GetOwnerSettingsService()->RemoveObserver(this);
   device_settings_service_->RemoveObserver(this);
 }
 
 // static
 bool DeviceSettingsProvider::IsDeviceSetting(const std::string& name) {
   const char** end = kKnownSettings + arraysize(kKnownSettings);
   return std::find(kKnownSettings, end, name) != end;
 }
 
 void DeviceSettingsProvider::DoSet(const std::string& path,
                                    const base::Value& in_value) {
   // Make sure that either the current user is the device owner or the
   // device doesn't have an owner yet.
   if (!(device_settings_service_->HasPrivateOwnerKey() ||
         ownership_status_ == DeviceSettingsService::OWNERSHIP_NONE)) {
     LOG(WARNING) << "Changing settings from non-owner, setting=" << path;
 
     // Revert UI change.
     NotifyObservers(path);
     return;
   }
 
-  if (!IsDeviceSetting(path)) {
+  if (IsDeviceSetting(path)) {
+    pending_changes_.push_back(PendingQueueElement(path, in_value.DeepCopy()));
+    if (!store_callback_factory_.HasWeakPtrs())
+      SetInPolicy();
+  } else {
     NOTREACHED() << "Try to set unhandled cros setting " << path;
-    return;
   }
-
-  if (device_settings_service_->HasPrivateOwnerKey()) {
-    // Directly set setting through OwnerSettingsService.
-    ownership::OwnerSettingsService* service =
-        device_settings_service_->GetOwnerSettingsService();
-    if (!service->Set(path, in_value)) {
-      NotifyObservers(path);
-      return;
-    }
-  } else {
-    // Temporary store new setting in
-    // |device_settings_|. |device_settings_| will be stored on a disk
-    // as soon as an ownership of device the will be taken.
-    OwnerSettingsServiceChromeOS::UpdateDeviceSettings(
-        path, in_value, device_settings_);
-    em::PolicyData data;
-    data.set_username(device_settings_service_->GetUsername());
-    CHECK(device_settings_.SerializeToString(data.mutable_policy_value()));
-
-    // Set the cache to the updated value.
-    UpdateValuesCache(data, device_settings_, TEMPORARILY_UNTRUSTED);
-
-    if (!device_settings_cache::Store(data, g_browser_process->local_state())) {
-      LOG(ERROR) << "Couldn't store to the temp storage.";
-      NotifyObservers(path);
-      return;
-    }
-  }
-
-  bool metrics_value;
-  if (path == kStatsReportingPref && in_value.GetAsBoolean(&metrics_value))
-    ApplyMetricsSetting(false, metrics_value);
 }
 
 void DeviceSettingsProvider::OwnershipStatusChanged() {
   DeviceSettingsService::OwnershipStatus new_ownership_status =
       device_settings_service_->GetOwnershipStatus();
 
-  if (device_settings_service_->GetOwnerSettingsService())
-    device_settings_service_->GetOwnerSettingsService()->AddObserver(this);
-
   // If the device just became owned, write the settings accumulated in the
   // cache to device settings proper. It is important that writing only happens
   // in this case, as during normal operation, the contents of the cache should
   // never overwrite actual device settings.
   if (new_ownership_status == DeviceSettingsService::OWNERSHIP_TAKEN &&
       ownership_status_ == DeviceSettingsService::OWNERSHIP_NONE &&
       device_settings_service_->HasPrivateOwnerKey()) {
     // There shouldn't be any pending writes, since the cache writes are all
     // immediate.
     DCHECK(!store_callback_factory_.HasWeakPtrs());
 
     trusted_status_ = TEMPORARILY_UNTRUSTED;
     // Apply the locally-accumulated device settings on top of the initial
     // settings from the service and write back the result.
     if (device_settings_service_->device_settings()) {
       em::ChromeDeviceSettingsProto new_settings(
           *device_settings_service_->device_settings());
       new_settings.MergeFrom(device_settings_);
       device_settings_.Swap(&new_settings);
     }
-
-    scoped_ptr<em::PolicyData> policy(new em::PolicyData());
-    policy->set_username(device_settings_service_->GetUsername());
-    CHECK(device_settings_.SerializeToString(policy->mutable_policy_value()));
-    if (!device_settings_service_->GetOwnerSettingsService()
-             ->CommitTentativeDeviceSettings(policy.Pass())) {
-      LOG(ERROR) << "Can't store policy";
-    }
+    StoreDeviceSettings();
   }
 
   // The owner key might have become available, allowing migration to happen.
   AttemptMigration();
 
   ownership_status_ = new_ownership_status;
 }
 
 void DeviceSettingsProvider::DeviceSettingsUpdated() {
   if (!store_callback_factory_.HasWeakPtrs())
     UpdateAndProceedStoring();
 }
 
-void DeviceSettingsProvider::OnTentativeChangesInPolicy(
-    const em::PolicyData& policy_data) {
-  em::ChromeDeviceSettingsProto device_settings;
-  CHECK(device_settings.ParseFromString(policy_data.policy_value()));
-  UpdateValuesCache(policy_data, device_settings, TEMPORARILY_UNTRUSTED);
-}
-
 void DeviceSettingsProvider::RetrieveCachedData() {
   em::PolicyData policy_data;
   if (!device_settings_cache::Retrieve(&policy_data,
                                        g_browser_process->local_state()) ||
       !device_settings_.ParseFromString(policy_data.policy_value())) {
     VLOG(1) << "Can't retrieve temp store, possibly not created yet.";
   }
 
   UpdateValuesCache(policy_data, device_settings_, trusted_status_);
 }
 
+void DeviceSettingsProvider::SetInPolicy() {
+  if (pending_changes_.empty()) {
+    NOTREACHED();
+    return;
+  }
+
+  if (RequestTrustedEntity() != TRUSTED) {
+    // Re-sync device settings before proceeding.
+    device_settings_service_->Load();
+    return;
+  }
+
+  std::string prop(pending_changes_.front().first);
+  scoped_ptr<base::Value> value(pending_changes_.front().second);
+  pending_changes_.pop_front();
+
+  trusted_status_ = TEMPORARILY_UNTRUSTED;
+  if (prop == kAccountsPrefAllowNewUser) {
+    em::AllowNewUsersProto* allow =
+        device_settings_.mutable_allow_new_users();
+    bool allow_value;
+    if (value->GetAsBoolean(&allow_value))
+      allow->set_allow_new_users(allow_value);
+    else
+      NOTREACHED();
+  } else if (prop == kAccountsPrefAllowGuest) {
+    em::GuestModeEnabledProto* guest =
+        device_settings_.mutable_guest_mode_enabled();
+    bool guest_value;
+    if (value->GetAsBoolean(&guest_value))
+      guest->set_guest_mode_enabled(guest_value);
+    else
+      NOTREACHED();
+  } else if (prop == kAccountsPrefSupervisedUsersEnabled) {
+    em::SupervisedUsersSettingsProto* supervised =
+        device_settings_.mutable_supervised_users_settings();
+    bool supervised_value;
+    if (value->GetAsBoolean(&supervised_value))
+      supervised->set_supervised_users_enabled(supervised_value);
+    else
+      NOTREACHED();
+  } else if (prop == kAccountsPrefShowUserNamesOnSignIn) {
+    em::ShowUserNamesOnSigninProto* show =
+        device_settings_.mutable_show_user_names();
+    bool show_value;
+    if (value->GetAsBoolean(&show_value))
+      show->set_show_user_names(show_value);
+    else
+      NOTREACHED();
+  } else if (prop == kAccountsPrefDeviceLocalAccounts) {
+    em::DeviceLocalAccountsProto* device_local_accounts =
+        device_settings_.mutable_device_local_accounts();
+    device_local_accounts->clear_account();
+    const base::ListValue* accounts_list = NULL;
+    if (value->GetAsList(&accounts_list)) {
+      for (base::ListValue::const_iterator entry(accounts_list->begin());
+           entry != accounts_list->end(); ++entry) {
+        const base::DictionaryValue* entry_dict = NULL;
+        if ((*entry)->GetAsDictionary(&entry_dict)) {
+          em::DeviceLocalAccountInfoProto* account =
+              device_local_accounts->add_account();
+          std::string account_id;
+          if (entry_dict->GetStringWithoutPathExpansion(
+                  kAccountsPrefDeviceLocalAccountsKeyId, &account_id)) {
+            account->set_account_id(account_id);
+          }
+          int type;
+          if (entry_dict->GetIntegerWithoutPathExpansion(
+                  kAccountsPrefDeviceLocalAccountsKeyType, &type)) {
+            account->set_type(
+                static_cast<em::DeviceLocalAccountInfoProto::AccountType>(
+                    type));
+          }
+          std::string kiosk_app_id;
+          if (entry_dict->GetStringWithoutPathExpansion(
+                  kAccountsPrefDeviceLocalAccountsKeyKioskAppId,
+                  &kiosk_app_id)) {
+            account->mutable_kiosk_app()->set_app_id(kiosk_app_id);
+          }
+        } else {
+          NOTREACHED();
+        }
+      }
+    } else {
+      NOTREACHED();
+    }
+  } else if (prop == kAccountsPrefDeviceLocalAccountAutoLoginId) {
+    em::DeviceLocalAccountsProto* device_local_accounts =
+        device_settings_.mutable_device_local_accounts();
+    std::string id;
+    if (value->GetAsString(&id))
+      device_local_accounts->set_auto_login_id(id);
+    else
+      NOTREACHED();
+  } else if (prop == kAccountsPrefDeviceLocalAccountAutoLoginDelay) {
+    em::DeviceLocalAccountsProto* device_local_accounts =
+        device_settings_.mutable_device_local_accounts();
+    int delay;
+    if (value->GetAsInteger(&delay))
+      device_local_accounts->set_auto_login_delay(delay);
+    else
+      NOTREACHED();
+  } else if (prop == kAccountsPrefDeviceLocalAccountAutoLoginBailoutEnabled) {
+    em::DeviceLocalAccountsProto* device_local_accounts =
+        device_settings_.mutable_device_local_accounts();
+    bool enabled;
+    if (value->GetAsBoolean(&enabled))
+      device_local_accounts->set_enable_auto_login_bailout(enabled);
+    else
+      NOTREACHED();
+  } else if (prop ==
+             kAccountsPrefDeviceLocalAccountPromptForNetworkWhenOffline) {
+    em::DeviceLocalAccountsProto* device_local_accounts =
+        device_settings_.mutable_device_local_accounts();
+    bool should_prompt;
+    if (value->GetAsBoolean(&should_prompt))
+      device_local_accounts->set_prompt_for_network_when_offline(should_prompt);
+    else
+      NOTREACHED();
+  } else if (prop == kSignedDataRoamingEnabled) {
+    em::DataRoamingEnabledProto* roam =
+        device_settings_.mutable_data_roaming_enabled();
+    bool roaming_value = false;
+    if (value->GetAsBoolean(&roaming_value))
+      roam->set_data_roaming_enabled(roaming_value);
+    else
+      NOTREACHED();
+  } else if (prop == kReleaseChannel) {
+    em::ReleaseChannelProto* release_channel =
+        device_settings_.mutable_release_channel();
+    std::string channel_value;
+    if (value->GetAsString(&channel_value))
+      release_channel->set_release_channel(channel_value);
+    else
+      NOTREACHED();
+  } else if (prop == kStatsReportingPref) {
+    em::MetricsEnabledProto* metrics =
+        device_settings_.mutable_metrics_enabled();
+    bool metrics_value = false;
+    if (value->GetAsBoolean(&metrics_value))
+      metrics->set_metrics_enabled(metrics_value);
+    else
+      NOTREACHED();
+    ApplyMetricsSetting(false, metrics_value);
+  } else if (prop == kAccountsPrefUsers) {
+    em::UserWhitelistProto* whitelist_proto =
+        device_settings_.mutable_user_whitelist();
+    whitelist_proto->clear_user_whitelist();
+    const base::ListValue* users;
+    if (value->GetAsList(&users)) {
+      for (base::ListValue::const_iterator i = users->begin();
+           i != users->end(); ++i) {
+        std::string email;
+        if ((*i)->GetAsString(&email))
+          whitelist_proto->add_user_whitelist(email);
+      }
+    }
+  } else if (prop == kAccountsPrefEphemeralUsersEnabled) {
+    em::EphemeralUsersEnabledProto* ephemeral_users_enabled =
+        device_settings_.mutable_ephemeral_users_enabled();
+    bool ephemeral_users_enabled_value = false;
+    if (value->GetAsBoolean(&ephemeral_users_enabled_value)) {
+      ephemeral_users_enabled->set_ephemeral_users_enabled(
+          ephemeral_users_enabled_value);
+    } else {
+      NOTREACHED();
+    }
+  } else if (prop == kAllowRedeemChromeOsRegistrationOffers) {
+    em::AllowRedeemChromeOsRegistrationOffersProto* allow_redeem_offers =
+        device_settings_.mutable_allow_redeem_offers();
+    bool allow_redeem_offers_value;
+    if (value->GetAsBoolean(&allow_redeem_offers_value)) {
+      allow_redeem_offers->set_allow_redeem_offers(
+          allow_redeem_offers_value);
+    } else {
+      NOTREACHED();
+    }
+  } else if (prop == kStartUpFlags) {
+    em::StartUpFlagsProto* flags_proto =
+        device_settings_.mutable_start_up_flags();
+    flags_proto->Clear();
+    const base::ListValue* flags;
+    if (value->GetAsList(&flags)) {
+      for (base::ListValue::const_iterator i = flags->begin();
+           i != flags->end(); ++i) {
+        std::string flag;
+        if ((*i)->GetAsString(&flag))
+          flags_proto->add_flags(flag);
+      }
+    }
+  } else if (prop == kSystemUse24HourClock) {
+    em::SystemUse24HourClockProto* use_24hour_clock_proto =
+        device_settings_.mutable_use_24hour_clock();
+    use_24hour_clock_proto->Clear();
+    bool use_24hour_clock_value;
+    if (value->GetAsBoolean(&use_24hour_clock_value)) {
+      use_24hour_clock_proto->set_use_24hour_clock(use_24hour_clock_value);
+    } else {
+      NOTREACHED();
+    }
+  } else if (prop == kAttestationForContentProtectionEnabled) {
+    em::AttestationSettingsProto* attestation_settings =
+        device_settings_.mutable_attestation_settings();
+    bool setting_enabled;
+    if (value->GetAsBoolean(&setting_enabled)) {
+      attestation_settings->set_content_protection_enabled(setting_enabled);
+    } else {
+      NOTREACHED();
+    }
+  } else {
+    // The remaining settings don't support Set(), since they are not
+    // intended to be customizable by the user:
+    //   kAccountsPrefTransferSAMLCookies
+    //   kAppPack
+    //   kDeviceAttestationEnabled
+    //   kDeviceOwner
+    //   kIdleLogoutTimeout
+    //   kIdleLogoutWarningDuration
+    //   kReleaseChannelDelegated
+    //   kReportDeviceActivityTimes
+    //   kReportDeviceBootMode
+    //   kReportDeviceLocation
+    //   kReportDeviceVersionInfo
+    //   kReportDeviceNetworkInterfaces
+    //   kReportDeviceUsers
+    //   kScreenSaverExtensionId
+    //   kScreenSaverTimeout
+    //   kServiceAccountIdentity
+    //   kStartUpUrls
+    //   kSystemTimezonePolicy
+    //   kVariationsRestrictParameter
+
+    LOG(FATAL) << "Device setting " << prop << " is read-only.";
+  }
+
+  em::PolicyData data;
+  data.set_username(device_settings_service_->GetUsername());
+  CHECK(device_settings_.SerializeToString(data.mutable_policy_value()));
+
+  // Set the cache to the updated value.
+  UpdateValuesCache(data, device_settings_, trusted_status_);
+
+  if (ownership_status_ == DeviceSettingsService::OWNERSHIP_TAKEN) {
+    StoreDeviceSettings();
+  } else {
+    if (!device_settings_cache::Store(data, g_browser_process->local_state()))
+      LOG(ERROR) << "Couldn't store to the temp storage.";
+
+    // OnStorePolicyCompleted won't get called in this case so proceed with any
+    // pending operations immediately.
+    if (!pending_changes_.empty())
+      SetInPolicy();
+  }
+}
+
 void DeviceSettingsProvider::UpdateValuesCache(
     const em::PolicyData& policy_data,
     const em::ChromeDeviceSettingsProto& settings,
     TrustedStatus trusted_status) {
   PrefValueMap new_values_cache;
 
   // If the device is not managed, or is consumer-managed, we set the device
   // owner value.
   if (policy_data.has_username() &&
       (!policy_data.has_request_token() ||
@@ skipping 123 matching lines @@
 DeviceSettingsProvider::TrustedStatus
     DeviceSettingsProvider::RequestTrustedEntity() {
   if (ownership_status_ == DeviceSettingsService::OWNERSHIP_NONE)
     return TRUSTED;
   return trusted_status_;
 }
 
 void DeviceSettingsProvider::UpdateAndProceedStoring() {
   // Re-sync the cache from the service.
   UpdateFromService();
+
+  // Trigger the next change if necessary.
+  if (trusted_status_ == TRUSTED && !pending_changes_.empty())
+    SetInPolicy();
 }
 
 bool DeviceSettingsProvider::UpdateFromService() {
   bool settings_loaded = false;
   switch (device_settings_service_->status()) {
     case DeviceSettingsService::STORE_SUCCESS: {
       const em::PolicyData* policy_data =
           device_settings_service_->policy_data();
       const em::ChromeDeviceSettingsProto* device_settings =
           device_settings_service_->device_settings();
@@ skipping 43 matching lines @@
 
   // Notify the observers we are done.
   std::vector<base::Closure> callbacks;
   callbacks.swap(callbacks_);
   for (size_t i = 0; i < callbacks.size(); ++i)
     callbacks[i].Run();
 
   return settings_loaded;
 }
 
+void DeviceSettingsProvider::StoreDeviceSettings() {
+  // Mute all previous callbacks to guarantee the |pending_changes_| queue is
+  // processed serially.
+  store_callback_factory_.InvalidateWeakPtrs();
+
+  device_settings_service_->SignAndStore(
+      scoped_ptr<em::ChromeDeviceSettingsProto>(
+          new em::ChromeDeviceSettingsProto(device_settings_)),
+      base::Bind(&DeviceSettingsProvider::UpdateAndProceedStoring,
+                 store_callback_factory_.GetWeakPtr()));
+}
+
 void DeviceSettingsProvider::AttemptMigration() {
   if (device_settings_service_->HasPrivateOwnerKey()) {
     PrefValueMap::const_iterator i;
     for (i = migration_values_.begin(); i != migration_values_.end(); ++i)
       DoSet(i->first, *i->second);
     migration_values_.Clear();
   }
 }
 
 }  // namespace chromeos