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

sync/internal_api/public/engine/sync_status.h

 // 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.
 
 #ifndef SYNC_INTERNAL_API_PUBLIC_ENGINE_STATUS_SUMMARY_H_
 #define SYNC_INTERNAL_API_PUBLIC_ENGINE_STATUS_SUMMARY_H_
 
 #include <string>
 
 #include "sync/base/sync_export.h"
@@ skipping 12 matching lines @@
   SyncStatus();
   ~SyncStatus();
 
   // TODO(akalin): Replace this with a NotificationsDisabledReason
   // variable.
   bool notifications_enabled;  // True only if subscribed for notifications.
 
   // Notifications counters updated by the actions in synapi.
   int notifications_received;
 
-  syncer::SyncProtocolError sync_protocol_error;
+  SyncProtocolError sync_protocol_error;
 
   // Number of encryption conflicts counted during most recent sync cycle.
   int encryption_conflicts;
 
   // Number of hierarchy conflicts counted during most recent sync cycle.
   int hierarchy_conflicts;
 
   // Number of simple conflicts counted during most recent sync cycle.
   int simple_conflicts;
 
@@ skipping 30 matching lines @@
 
   // Count of sync cycles that successfully committed items;
   int sync_cycles_with_commits;
   int sync_cycles_without_commits;
 
   // Count of useless and useful syncs we perform.
   int useless_sync_cycles;
   int useful_sync_cycles;
 
   // Encryption related.
-  syncer::ModelTypeSet encrypted_types;
+  ModelTypeSet encrypted_types;
   bool cryptographer_ready;
   bool crypto_has_pending_keys;
 
   // Per-datatype throttled status.
-  syncer::ModelTypeSet throttled_types;
+  ModelTypeSet throttled_types;
 
   // The unique identifer for this client.
   std::string unique_id;
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_PUBLIC_ENGINE_STATUS_SUMMARY_H_