Add ExtensionManagement based ExternalLoader

chrome/browser/chromeos/policy/device_local_account_extension_tracker.cc

 // 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.
 
 #include "chrome/browser/chromeos/policy/device_local_account_extension_tracker.h"
 
 #include "base/logging.h"
 #include "base/prefs/pref_value_map.h"
 #include "base/values.h"
 #include "chrome/browser/chromeos/policy/device_local_account.h"
@@ skipping 37 matching lines @@
   UpdateFromStore();
 }
 
 void DeviceLocalAccountExtensionTracker::OnStoreError(CloudPolicyStore* store) {
   UpdateFromStore();
 }
 
 void DeviceLocalAccountExtensionTracker::UpdateFromStore() {
   const policy::PolicyMap& policy_map = store_->policy_map();
 
+  // TODO(binjin): Use two policy handlers here after
+  // ExtensionManagementPolicyHandler is introduced.
   extensions::ExtensionInstallForcelistPolicyHandler policy_handler;
   if (!policy_handler.CheckPolicySettings(policy_map, NULL))
     return;
 
   PrefValueMap pref_value_map;
   policy_handler.ApplyPolicySettings(policy_map, &pref_value_map);
 
   const base::Value* value = NULL;
   const base::DictionaryValue* dict = NULL;
   if (!pref_value_map.GetValue(extensions::pref_names::kInstallForceList,
                                &value) ||
       !value->GetAsDictionary(&dict)) {
     return;
   }
 
   for (base::DictionaryValue::Iterator it(*dict); !it.IsAtEnd(); it.Advance()) {
     PolicyNamespace ns(POLICY_DOMAIN_EXTENSIONS, it.key());
     schema_registry_->RegisterComponent(ns, Schema());
   }
 
   // Removing an extension from a public session at runtime can happen but is
   // a rare event. In that case we leave the extension ID in the SchemaRegistry,
   // and it will be purged on the next restart.
 }
 
 }  // namespace policy