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

chrome/browser/policy/policy_domain_descriptor.cc

 // Copyright (c) 2013 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/policy_domain_descriptor.h"
 
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "base/values.h"
 #include "chrome/browser/policy/policy_bundle.h"
@@ skipping 30 matching lines @@
   }
 
   return true;
 }
 
 }  // namespace
 
 PolicyDomainDescriptor::PolicyDomainDescriptor(PolicyDomain domain)
     : domain_(domain) {}
 
+const PolicySchema* PolicyDomainDescriptor::get_schema(
+    const std::string& component) const {
+  SchemaMap::const_iterator iter = components().find(component);
+  if (iter != components().end())
+    return iter->second;
+  return NULL;
+}
+
 void PolicyDomainDescriptor::RegisterComponent(
     const std::string& component_id,
     scoped_ptr<PolicySchema> schema) {
   const PolicySchema*& entry = schema_map_[component_id];
   delete entry;
   entry = schema.release();
 }
 
 void PolicyDomainDescriptor::FilterBundle(PolicyBundle* bundle) const {
   for (PolicyBundle::iterator it_bundle = bundle->begin();
@@ skipping 29 matching lines @@
         map->Erase(policy_name);
     }
   }
 }
 
 PolicyDomainDescriptor::~PolicyDomainDescriptor() {
   STLDeleteValues(&schema_map_);
 }
 
 }  // namespace policy