Refresh policies from DM server periodically

chrome/browser/policy/device_management_policy_cache.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/device_management_policy_cache.h"
 
 #include <limits>
 #include <string>
 
 #include "base/file_util.h"
@@ skipping 87 matching lines @@
   // Decode and swap in the new policy information.
   scoped_ptr<DictionaryValue> value(DecodePolicy(cached_policy.policy()));
   {
     AutoLock lock(lock_);
     if (!fresh_policy_)
       policy_.reset(value.release());
     last_policy_refresh_time_ = timestamp;
   }
 }
 
-void DeviceManagementPolicyCache::SetPolicy(
+bool DeviceManagementPolicyCache::SetPolicy(
     const em::DevicePolicyResponse& policy) {
   DictionaryValue* value = DeviceManagementPolicyCache::DecodePolicy(policy);
+  bool new_policy_differs = !(value->Equals(policy_.get()));

[danno, 2010/11/22 13:47:50]

const bool

[Jakob Kummerow (corp), 2010/11/22 16:56:08]

Done.

   base::Time now(base::Time::Now());
   {
     AutoLock lock(lock_);
     policy_.reset(value);
     fresh_policy_ = true;
     last_policy_refresh_time_ = now;
   }
 
   em::DevicePolicyResponse* policy_copy = new em::DevicePolicyResponse;
   policy_copy->CopyFrom(policy);
   BrowserThread::PostTask(
       BrowserThread::FILE,
       FROM_HERE,
       new PersistPolicyTask(backing_file_path_, policy_copy,
                             base::Time::NowFromSystemTime()));
+  return new_policy_differs;
 }
 
 DictionaryValue* DeviceManagementPolicyCache::GetPolicy() {
   AutoLock lock(lock_);
   return static_cast<DictionaryValue*>(policy_->DeepCopy());
 }
 
 // static
 Value* DeviceManagementPolicyCache::DecodeIntegerValue(
     google::protobuf::int64 value) {
@@ skipping 99 matching lines @@
             DeviceManagementPolicyCache::DecodeValue(named_value->value());
         if (decoded_value)
           result->Set(named_value->name(), decoded_value);
       }
     }
   }
   return result;
 }
 
 }  // namespace policy