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

chrome/browser/policy/policy_service_impl.cc

Index: chrome/browser/policy/policy_service_impl.cc
diff --git a/chrome/browser/policy/policy_service_impl.cc b/chrome/browser/policy/policy_service_impl.cc
index 2cfdcbbd1341cf92b69518954643584d5bc255d7..7bb477b973d4348967f3e56ab65369936591c268 100644
--- a/chrome/browser/policy/policy_service_impl.cc
+++ b/chrome/browser/policy/policy_service_impl.cc
@@ -69,6 +69,13 @@ void PolicyServiceImpl::RegisterPolicyDomain(
     (*it)->RegisterPolicyDomain(descriptor);
 }
 
+void PolicyServiceImpl::InitialRegisterPolicyDomain(
+    scoped_refptr<const PolicyDomainDescriptor> descriptor) {
+  domain_descriptors_[descriptor->domain()] = descriptor;
+  for (Iterator it = providers_.begin(); it != providers_.end(); ++it)
+    (*it)->InitialRegisterPolicyDomain(descriptor);
+}
+
 const PolicyMap& PolicyServiceImpl::GetPolicies(
     const PolicyNamespace& ns) const {
   return policy_bundle_.Get(ns);