Use base::MessageLoop in more files.

base/prefs/pref_service.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 "base/prefs/pref_service.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
@@ skipping 61 matching lines @@
   pref_registry_ = NULL;
   user_pref_store_ = NULL;
   pref_notifier_.reset();
 }
 
 void PrefService::InitFromStorage(bool async) {
   if (!async) {
     read_error_callback_.Run(user_pref_store_->ReadPrefs());
   } else {
     // Guarantee that initialization happens after this function returned.
-    MessageLoop::current()->PostTask(
+    base::MessageLoop::current()->PostTask(
         FROM_HERE,
         base::Bind(&PersistentPrefStore::ReadPrefsAsync,
                    user_pref_store_.get(),
                    new ReadErrorHandler(read_error_callback_)));
   }
 }
 
 bool PrefService::ReloadPersistentPrefs() {
   return user_pref_store_->ReadPrefs() ==
              PersistentPrefStore::PREF_READ_ERROR_NONE;
@@ skipping 486 matching lines @@
       DCHECK(found_value->IsType(default_type));
       return found_value;
     } else {
       // Every registered preference has at least a default value.
       NOTREACHED() << "no valid value found for registered pref " << path;
     }
   }
 
   return NULL;
 }