policy: use JSON schema to deserialize entries from Windows registry.

chrome/browser/policy/async_policy_loader.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/policy/async_policy_loader.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/sequenced_task_runner.h"
 #include "chrome/browser/policy/policy_bundle.h"
@@ skipping 50 matching lines @@
   // Filter out mismatching policies.
   for (DescriptorMap::iterator it = descriptor_map_.begin();
        it != descriptor_map_.end(); ++it) {
     it->second->FilterBundle(bundle.get());
   }
 
   update_callback_.Run(bundle.Pass());
   ScheduleNextReload(TimeDelta::FromSeconds(kReloadIntervalSeconds));
 }
 
+scoped_refptr<const PolicyDomainDescriptor> AsyncPolicyLoader::get_descriptor(
+    PolicyDomain domain) const {
+  DescriptorMap::const_iterator iter = descriptor_map().find(domain);
+  if (iter != descriptor_map().end())
+    return iter->second;
+  return NULL;
+}
+
 void AsyncPolicyLoader::RegisterPolicyDomain(
     scoped_refptr<const PolicyDomainDescriptor> descriptor) {
   InitialRegisterPolicyDomain(descriptor);
   Reload(true);
 }
 
 scoped_ptr<PolicyBundle> AsyncPolicyLoader::InitialLoad() {
   // This is the first load, early during startup. Use this to record the
   // initial |last_modification_time_|, so that potential changes made before
   // installing the watches can be detected.
@@ skipping 52 matching lines @@
   const base::TimeDelta age = now - last_modification_clock_;
   if (age < kSettleInterval) {
     *delay = kSettleInterval - age;
     return false;
   }
 
   return true;
 }
 
 }  // namespace policy