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

sync/api/syncable_service.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_API_SYNCABLE_SERVICE_H_
 #define SYNC_API_SYNCABLE_SERVICE_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
@@ skipping 19 matching lines @@
   // Informs the service to begin syncing the specified synced datatype |type|.
   // The service should then merge |initial_sync_data| into it's local data,
   // calling |sync_processor|'s ProcessSyncChanges as necessary to reconcile the
   // two. After this, the SyncableService's local data should match the server
   // data, and the service should be ready to receive and process any further
   // SyncChange's as they occur.
   // Returns: A default SyncError (IsSet() == false) if no errors were
   //          encountered, and a filled SyncError (IsSet() == true)
   //          otherwise.
   virtual SyncError MergeDataAndStartSyncing(
-      syncer::ModelType type,
+      ModelType type,
       const SyncDataList& initial_sync_data,
       scoped_ptr<SyncChangeProcessor> sync_processor,
       scoped_ptr<SyncErrorFactory> error_handler) = 0;
 
   // Stop syncing the specified type and reset state.
-  virtual void StopSyncing(syncer::ModelType type) = 0;
+  virtual void StopSyncing(ModelType type) = 0;
 
   // Fills a list of SyncData from the local data. This should create an up
   // to date representation of the SyncableService's view of that datatype, and
   // should match/be a subset of the server's view of that datatype.
-  virtual SyncDataList GetAllSyncData(syncer::ModelType type) const = 0;
+  virtual SyncDataList GetAllSyncData(ModelType type) const = 0;
 
   // SyncChangeProcessor interface.
   // Process a list of new SyncChanges and update the local data as necessary.
   // Returns: A default SyncError (IsSet() == false) if no errors were
   //          encountered, and a filled SyncError (IsSet() == true)
   //          otherwise.
   virtual SyncError ProcessSyncChanges(
       const tracked_objects::Location& from_here,
       const SyncChangeList& change_list) OVERRIDE = 0;
 
  protected:
   virtual ~SyncableService();
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_API_SYNCABLE_SERVICE_H_