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

chrome/browser/policy/policy_domain_descriptor.cc

Index: chrome/browser/policy/policy_domain_descriptor.cc
diff --git a/chrome/browser/policy/policy_domain_descriptor.cc b/chrome/browser/policy/policy_domain_descriptor.cc
index c841a55a5acc32ab5e361e8654722c13b9de2114..38327de95ab46fb0d41c022d036e336c64286b1b 100644
--- a/chrome/browser/policy/policy_domain_descriptor.cc
+++ b/chrome/browser/policy/policy_domain_descriptor.cc
@@ -57,9 +57,6 @@ void PolicyDomainDescriptor::RegisterComponent(
 }
 
 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;