Refactor FileBasedPolicyProvider, introduce AsynchronousPolicyProvider.

chrome/browser/policy/mock_configuration_policy_provider.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/policy/mock_configuration_policy_provider.h"
 
+#include "base/stl_util-inl.h"
 #include "chrome/browser/policy/configuration_policy_pref_store.h"
 
 namespace policy {
 
 MockConfigurationPolicyProvider::MockConfigurationPolicyProvider()
     : ConfigurationPolicyProvider(
         ConfigurationPolicyPrefStore::GetChromePolicyDefinitionList()) {
 }
 
 MockConfigurationPolicyProvider::~MockConfigurationPolicyProvider() {
   STLDeleteValues(&policy_map_);
 }
 
 void MockConfigurationPolicyProvider::AddPolicy(ConfigurationPolicyType policy,
                                                 Value* value) {
   std::swap(policy_map_[policy], value);
   delete value;
 }
 
 bool MockConfigurationPolicyProvider::Provide(
     ConfigurationPolicyStoreInterface* store) {
   for (PolicyMap::const_iterator current = policy_map_.begin();
        current != policy_map_.end(); ++current) {
     store->Apply(current->first, current->second->DeepCopy());
   }
   return true;
 }
 
 }