Policy providers all get a SchemaRegistry to work with.

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"
-#include "chrome/browser/policy/policy_map.h"
-
-namespace policy {
-
-PolicyDomainDescriptor::PolicyDomainDescriptor(PolicyDomain domain)
-    : domain_(domain) {}
-
-void PolicyDomainDescriptor::RegisterComponent(const std::string& component_id,
-                                               Schema schema) {
-  schema_map_[component_id] = schema;
-}
-
-void PolicyDomainDescriptor::FilterBundle(PolicyBundle* bundle) const {
-  // Chrome policies are not filtered, so that typos appear in about:policy.
-  DCHECK_NE(POLICY_DOMAIN_CHROME, domain_);
-
-  for (PolicyBundle::iterator it_bundle = bundle->begin();
-       it_bundle != bundle->end(); ++it_bundle) {
-    const PolicyNamespace& ns = it_bundle->first;
-    if (ns.domain != domain_)
-      continue;
-
-    SchemaMap::const_iterator it_schema = schema_map_.find(ns.component_id);
-    if (it_schema == schema_map_.end()) {
-      // Component ID not found.
-      it_bundle->second->Clear();
-      continue;
-    }
-
-    // TODO(joaodasilva): if a component is registered but doesn't have a schema
-    // then its policies aren't filtered. This behavior is enabled for M29 to
-    // allow a graceful update of the Legacy Browser Support extension; it'll
-    // be removed for M32. http://crbug.com/240704
-    Schema schema = it_schema->second;
-    if (!schema.valid())
-      continue;
-
-    PolicyMap* map = it_bundle->second;
-    for (PolicyMap::const_iterator it_map = map->begin();
-         it_map != map->end();) {
-      const std::string& policy_name = it_map->first;
-      const base::Value* policy_value = it_map->second.value;
-      Schema policy_schema = schema.GetProperty(policy_name);
-      ++it_map;
-      if (!policy_value || !policy_schema.Validate(*policy_value))
-        map->Erase(policy_name);
-    }
-  }
-}
-
-PolicyDomainDescriptor::~PolicyDomainDescriptor() {}
-
-}  // namespace policy