[Sync] Remove unneeded 'using syncer::' lines and 'syncer::' scopings

sync/notifier/sync_notifier_factory.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 "sync/notifier/sync_notifier_factory.h"
 
 #include <string>
 
 #include "base/logging.h"
 #include "jingle/notifier/listener/push_client.h"
 #include "sync/notifier/non_blocking_invalidation_notifier.h"
 #include "sync/notifier/p2p_notifier.h"
 #include "sync/notifier/sync_notifier.h"
 
 namespace syncer {
 namespace {
 
 SyncNotifier* CreateDefaultSyncNotifier(
     const notifier::NotifierOptions& notifier_options,
     const InvalidationVersionMap& initial_max_invalidation_versions,
     const std::string& initial_invalidation_state,
-    const syncer::WeakHandle<InvalidationStateTracker>&
-        invalidation_state_tracker,
+    const WeakHandle<InvalidationStateTracker>& invalidation_state_tracker,
     const std::string& client_info) {
   if (notifier_options.notification_method == notifier::NOTIFICATION_P2P) {
     // TODO(rlarocque): Ideally, the notification target would be
     // NOTIFY_OTHERS.  There's no good reason to notify ourselves of our own
     // commits.  We self-notify for now only because the integration tests rely
     // on this behaviour.  See crbug.com/97780.
     return new P2PNotifier(
         notifier::PushClient::CreateDefault(notifier_options),
         NOTIFY_ALL);
   }
@@ skipping 33 matching lines @@
   return NULL;
 #else
   return CreateDefaultSyncNotifier(notifier_options_,
                                    initial_max_invalidation_versions_,
                                    initial_invalidation_state_,
                                    invalidation_state_tracker_,
                                    client_info_);
 #endif
 }
 }  // namespace syncer