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

sync/syncable/nigori_util.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.
 
 // Various utility methods for nigori-based multi-type encryption.
 
 #ifndef SYNC_SYNCABLE_NIGORI_UTIL_H_
 #define SYNC_SYNCABLE_NIGORI_UTIL_H_
 
 #include "base/compiler_specific.h"
@@ skipping 23 matching lines @@
 // This method is similar to ProcessUnsyncedChangesForEncryption but does not
 // modify the data and does not care if data is unnecessarily encrypted.
 bool VerifyUnsyncedChangesAreEncrypted(
     BaseTransaction* const trans,
     ModelTypeSet encrypted_types);
 
 // Processes all unsynced changes and ensures they are appropriately encrypted
 // or unencrypted, based on |encrypted_types|.
 bool ProcessUnsyncedChangesForEncryption(
     WriteTransaction* const trans,
-    syncer::Cryptographer* cryptographer);
+    Cryptographer* cryptographer);
 
 // Returns true if the entry requires encryption but is not encrypted, false
 // otherwise. Note: this does not check that already encrypted entries are
 // encrypted with the proper key.
 bool EntryNeedsEncryption(ModelTypeSet encrypted_types,
                           const Entry& entry);
 
 // Same as EntryNeedsEncryption, but looks at specifics.
 bool SpecificsNeedsEncryption(ModelTypeSet encrypted_types,
                               const sync_pb::EntitySpecifics& specifics);
 
 // Verifies all data of type |type| is encrypted appropriately.
 bool VerifyDataTypeEncryptionForTest(
     BaseTransaction* const trans,
-    syncer::Cryptographer* cryptographer,
+    Cryptographer* cryptographer,
     ModelType type,
     bool is_encrypted) WARN_UNUSED_RESULT;
 
 // Stores |new_specifics| into |entry|, encrypting if necessary.
 // Returns false if an error encrypting occurred (does not modify |entry|).
 // Note: gracefully handles new_specifics aliasing with entry->Get(SPECIFICS).
 bool UpdateEntryWithEncryption(
-    syncer::Cryptographer* cryptographer,
+    Cryptographer* cryptographer,
     const sync_pb::EntitySpecifics& new_specifics,
     MutableEntry* entry);
 
 }  // namespace syncable
 }  // namespace syncer
 
 #endif  // SYNC_SYNCABLE_NIGORI_UTIL_H_