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

chrome/browser/policy/async_policy_loader.h

Index: chrome/browser/policy/async_policy_loader.h
diff --git a/chrome/browser/policy/async_policy_loader.h b/chrome/browser/policy/async_policy_loader.h
index e80bf6f7e7027446f25820aed115aa50bbbb14dc..e9de9a3eec926413d6f808719310e839782e692d 100644
--- a/chrome/browser/policy/async_policy_loader.h
+++ b/chrome/browser/policy/async_policy_loader.h
@@ -35,6 +35,8 @@ class PolicyDomainDescriptor;
 // LastModificationTime() is also invoked once on that thread at startup.
 class AsyncPolicyLoader {
  public:
+  typedef base::Callback<void(scoped_ptr<PolicyBundle>)> UpdateCallback;
+
   explicit AsyncPolicyLoader(
       scoped_refptr<base::SequencedTaskRunner> task_runner);
   virtual ~AsyncPolicyLoader();
@@ -47,6 +49,10 @@ class AsyncPolicyLoader {
   // invoked from the thread that owns the provider.
   virtual scoped_ptr<PolicyBundle> Load() = 0;
 
+  // Used by the AsyncPolicyProvider to install the |update_callback_|.
+  // Invoked on the background thread.
+  void Init(const UpdateCallback& update_callback);
+
   // Allows implementations to finalize their initialization on the background
   // thread (e.g. setup file watchers).
   virtual void InitOnBackgroundThread() = 0;
@@ -71,6 +77,10 @@ class AsyncPolicyLoader {
   void RegisterPolicyDomain(
       scoped_refptr<const PolicyDomainDescriptor> descriptor);
 
+  // Registers a policy domain without triggering a policy load.
+  void InitialRegisterPolicyDomain(
+      scoped_refptr<const PolicyDomainDescriptor> descriptor);
+
  protected:
   typedef std::map<PolicyDomain, scoped_refptr<const PolicyDomainDescriptor> >
       DescriptorMap;
@@ -80,24 +90,18 @@ class AsyncPolicyLoader {
   // unknonwn policies.
   const DescriptorMap& descriptor_map() const { return descriptor_map_; }
 
+  // Returns the desired descriptor if it exists, otherwise NULL.
+  scoped_refptr<const PolicyDomainDescriptor> get_descriptor(
+      PolicyDomain domain) const;
+
  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();
 
-  // Registers a policy domain without triggering a policy load.
-  void InitialRegisterPolicyDomain(
-      scoped_refptr<const PolicyDomainDescriptor> descriptor);
-
-  // Used by the AsyncPolicyProvider to install the |update_callback_|.
-  // Invoked on the background thread.
-  void Init(const UpdateCallback& update_callback);
-
   // Cancels any pending periodic reload and posts one |delay| time units from
   // now.
   void ScheduleNextReload(base::TimeDelta delay);