Make the internal storage of policy::Schemas ref counted.

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 f054710a5d13a9b953c8b99c0a74ce6ddf95c407..3719860fc4eaf094a63823a1deddc07d1d00001f 100644
--- a/chrome/browser/policy/policy_domain_descriptor.cc
+++ b/chrome/browser/policy/policy_domain_descriptor.cc
@@ -47,13 +47,9 @@ bool Matches(Schema schema, const base::Value& value) {
 PolicyDomainDescriptor::PolicyDomainDescriptor(PolicyDomain domain)
     : domain_(domain) {}
 
-void PolicyDomainDescriptor::RegisterComponent(
-    const std::string& component_id,
-    scoped_ptr<SchemaOwner> schema) {
-  SchemaOwner*& entry = schema_owner_map_[component_id];
-  delete entry;
-  entry = schema.release();
-  schema_map_[component_id] = entry ? entry->schema() : Schema();
+void PolicyDomainDescriptor::RegisterComponent(const std::string& component_id,
+                                               Schema schema) {
+  schema_map_[component_id] = schema;
 }
 
 void PolicyDomainDescriptor::FilterBundle(PolicyBundle* bundle) const {
@@ -94,8 +90,6 @@ void PolicyDomainDescriptor::FilterBundle(PolicyBundle* bundle) const {
   }
 }
 
-PolicyDomainDescriptor::~PolicyDomainDescriptor() {
-  STLDeleteValues(&schema_owner_map_);
-}
+PolicyDomainDescriptor::~PolicyDomainDescriptor() {}
 
 }  // namespace policy