policy: load JSON schema into domain descriptor at start time.

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 2da0a3366f7d42190dad20f0725ae2546c18633e..e80bf6f7e7027446f25820aed115aa50bbbb14dc 100644
--- a/chrome/browser/policy/async_policy_loader.h
+++ b/chrome/browser/policy/async_policy_loader.h
@@ -90,6 +90,10 @@ class AsyncPolicyLoader {
   // 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);