Moved JsonPrefStore to use SequencedWorkerPool

chrome/browser/prefs/pref_service_unittest.cc

Index: chrome/browser/prefs/pref_service_unittest.cc
diff --git a/chrome/browser/prefs/pref_service_unittest.cc b/chrome/browser/prefs/pref_service_unittest.cc
index 782740bcbbf1b9da2ca7818c6add4c6dfe695486..e5d58b7c4af012d75bb64e89155029757813e29c 100644
--- a/chrome/browser/prefs/pref_service_unittest.cc
+++ b/chrome/browser/prefs/pref_service_unittest.cc
@@ -301,7 +301,7 @@ class PrefServiceUserFilePrefsTest : public testing::Test {
   ScopedTempDir temp_dir_;
   // The path to the directory where the test data is stored.
   FilePath data_dir_;
-  // A message loop that we can use as the file thread message loop.
+  // A message loop that we need for firing timers.
   MessageLoop message_loop_;
 };
 
@@ -315,7 +315,7 @@ TEST_F(PrefServiceUserFilePrefsTest, PreserveEmptyValue) {
       pref_file));
 
   PrefServiceMockBuilder builder;
-  builder.WithUserFilePrefs(pref_file, base::MessageLoopProxy::current());
+  builder.WithUserFilePrefs(pref_file, message_loop_.message_loop_proxy());
   scoped_ptr<PrefService> prefs(builder.Create());
 
   // Register testing prefs.
@@ -344,7 +344,7 @@ TEST_F(PrefServiceUserFilePrefsTest, PreserveEmptyValue) {
 
   // Write to file.
   prefs->CommitPendingWrite();
-  MessageLoop::current()->RunAllPending();
+  message_loop_.RunAllPending();
 
   // Compare to expected output.
   FilePath golden_output_file =