Moved JsonPrefStore to use SequencedWorkerPool

chrome/browser/policy/managed_mode_policy_provider.cc

 // Copyright (c) 2012 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/managed_mode_policy_provider.h"
 
+#include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/policy/policy_bundle.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/json_pref_store.h"
 #include "chrome/common/chrome_constants.h"
 #include "content/public/browser/browser_thread.h"
 #include "policy/policy_constants.h"
 
 using content::BrowserThread;
 
 namespace policy {
 
 // static
 const char ManagedModePolicyProvider::kPolicies[] = "policies";
 
 // static
 ManagedModePolicyProvider* ManagedModePolicyProvider::Create(Profile* profile) {
+  FilePath path = profile->GetPath().Append(chrome::kManagedModePolicyFilename);
   JsonPrefStore* pref_store =
-      new JsonPrefStore(profile->GetPath().Append(
-                            chrome::kManagedModePolicyFilename),
-                        BrowserThread::GetMessageLoopProxyForThread(
-                            BrowserThread::FILE));
+      JsonPrefStore::Create(path, BrowserThread::GetBlockingPool());
   return new ManagedModePolicyProvider(pref_store);
 }
 
 ManagedModePolicyProvider::ManagedModePolicyProvider(
     PersistentPrefStore* pref_store)
     : store_(pref_store) {
   store_->AddObserver(this);
   store_->ReadPrefsAsync(NULL);
 }
 
@@ skipping 59 matching lines @@
 void ManagedModePolicyProvider::UpdatePolicyFromCache() {
   scoped_ptr<PolicyBundle> policy_bundle(new PolicyBundle);
   PolicyMap* policy_map =
       &policy_bundle->Get(POLICY_DOMAIN_CHROME, std::string());
   policy_map->LoadFrom(GetCachedPolicy(),
                        POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER);
   UpdatePolicy(policy_bundle.Pass());
 }
 
 }  // namespace policy