Policy providers all get a SchemaRegistry to work with.

chrome/browser/policy/async_policy_loader.h

 // 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.
 
 #ifndef CHROME_BROWSER_POLICY_ASYNC_POLICY_LOADER_H_
 #define CHROME_BROWSER_POLICY_ASYNC_POLICY_LOADER_H_
 
-#include <map>
-
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
-#include "components/policy/core/common/policy_namespace.h"
+#include "chrome/browser/policy/schema_map.h"
 
 namespace base {
 class SequencedTaskRunner;
 }
 
 namespace policy {
 
 class PolicyBundle;
-class PolicyDomainDescriptor;
 
 // Base implementation for platform-specific policy loaders. Together with the
 // AsyncPolicyProvider, this base implementation takes care of the initial load,
 // periodic reloads, watching file changes, refreshing policies and object
 // lifetime.
 //
 // All methods are invoked on the background |task_runner_|, including the
 // destructor. The only exceptions are the constructor (which may be called on
 // any thread), and the initial Load() which is called on the thread that owns
 // the provider.
@@ skipping 13 matching lines @@
   virtual scoped_ptr<PolicyBundle> Load() = 0;
 
   // Allows implementations to finalize their initialization on the background
   // thread (e.g. setup file watchers).
   virtual void InitOnBackgroundThread() = 0;
 
   // Implementations should return the time of the last modification detected,
   // or base::Time() if it doesn't apply, which is the default.
   virtual base::Time LastModificationTime();
 
+  // Used by the AsyncPolicyProvider to do the initial Load(). The first load
+  // is also used to initialize |last_modification_time_| and
+  // |schema_map_|.
+  scoped_ptr<PolicyBundle> InitialLoad(const scoped_refptr<SchemaMap>& schemas);
+
   // Implementations should invoke Reload() when a change is detected. This
   // must be invoked from the background thread and will trigger a Load(),
   // and pass the returned bundle to the provider.
   // The load is immediate when |force| is true. Otherwise, the loader
   // reschedules the reload until the LastModificationTime() is a couple of
   // seconds in the past. This mitigates the problem of reading files that are
   // currently being written to, and whose contents are incomplete.
   // A reload is posted periodically, if it hasn't been triggered recently. This
   // makes sure the policies are reloaded if the update events aren't triggered.
   void Reload(bool force);
 
-  // Passes the current |descriptor| for a domain, which is used to determine
-  // which policy names are supported for each component.
-  void RegisterPolicyDomain(
-      scoped_refptr<const PolicyDomainDescriptor> descriptor);
-
- protected:
-  typedef std::map<PolicyDomain, scoped_refptr<const PolicyDomainDescriptor> >
-      DescriptorMap;
-
-  // Returns the current DescriptorMap. This can be used by implementations to
-  // determine the components registered for each domain, and to filter out
-  // unknonwn policies.
-  const DescriptorMap& descriptor_map() const { return descriptor_map_; }
+  const scoped_refptr<SchemaMap>& schema_map() const { return schema_map_; }
 
  private:
   // Allow AsyncPolicyProvider to call Init().
   friend class AsyncPolicyProvider;
 
   typedef base::Callback<void(scoped_ptr<PolicyBundle>)> UpdateCallback;
 
-  // Used by the AsyncPolicyProvider to do the initial Load(). The first load
-  // is also used to initialize |last_modification_time_|.
-  scoped_ptr<PolicyBundle> InitialLoad();
-
   // Used by the AsyncPolicyProvider to install the |update_callback_|.
   // Invoked on the background thread.
   void Init(const UpdateCallback& update_callback);
 
+  // Used by the AsyncPolicyProvider to reload with an updated SchemaMap.
+  void RefreshPolicies(scoped_refptr<SchemaMap> schema_map);
+
   // Cancels any pending periodic reload and posts one |delay| time units from
   // now.
   void ScheduleNextReload(base::TimeDelta delay);
 
   // Checks if the underlying files haven't changed recently, by checking the
   // LastModificationTime(). |delay| is updated with a suggested time to wait
   // before retrying when this returns false.
   bool IsSafeToReload(const base::Time& now, base::TimeDelta* delay);
 
   // Task runner to run background threads.
   scoped_refptr<base::SequencedTaskRunner> task_runner_;
 
   // Callback for updates, passed in Init().
   UpdateCallback update_callback_;
 
   // Used to get WeakPtrs for the periodic reload task.
   base::WeakPtrFactory<AsyncPolicyLoader> weak_factory_;
 
   // Records last known modification timestamp.
   base::Time last_modification_time_;
 
   // The wall clock time at which the last modification timestamp was
   // recorded.  It's better to not assume the file notification time and the
   // wall clock times come from the same source, just in case there is some
   // non-local filesystem involved.
   base::Time last_modification_clock_;
 
-  // A map of the currently registered domains and their descriptors.
-  DescriptorMap descriptor_map_;
+  // The current policy schemas that this provider should load.
+  scoped_refptr<SchemaMap> schema_map_;
 
   DISALLOW_COPY_AND_ASSIGN(AsyncPolicyLoader);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_ASYNC_POLICY_LOADER_H_