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

sync/engine/build_commit_command.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/engine/build_commit_command.h"
 
 #include <limits>
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 19 matching lines @@
 
 using sessions::SyncSession;
 using syncable::Entry;
 using syncable::IS_DEL;
 using syncable::SERVER_POSITION_IN_PARENT;
 using syncable::IS_UNAPPLIED_UPDATE;
 using syncable::IS_UNSYNCED;
 using syncable::Id;
 using syncable::MutableEntry;
 using syncable::SPECIFICS;
-using syncer::UNSPECIFIED;
 
 // static
 int64 BuildCommitCommand::GetFirstPosition() {
   return std::numeric_limits<int64>::min();
 }
 
 // static
 int64 BuildCommitCommand::GetLastPosition() {
   return std::numeric_limits<int64>::max();
 }
@@ skipping 208 matching lines @@
   if (delta <= static_cast<uint64>(GetGap()*2))
     return lo + (static_cast<int64>(delta) + 7) / 8;  // Interpolate.
   else if (lo == GetFirstPosition())
     return hi - GetGap();  // Extend range just before successor.
   else
     return lo + GetGap();  // Use or extend range just after predecessor.
 }
 
 
 }  // namespace syncer