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

sync/engine/syncer_proto_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.
 
 #ifndef SYNC_ENGINE_SYNCER_PROTO_UTIL_H_
 #define SYNC_ENGINE_SYNCER_PROTO_UTIL_H_
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
@@ skipping 59 matching lines @@
   static const std::string& NameFromSyncEntity(
       const sync_pb::SyncEntity& entry);
 
   // Extract the name field from a commit entry response.
   static const std::string& NameFromCommitEntryResponse(
       const sync_pb::CommitResponse_EntryResponse& entry);
 
   // EntitySpecifics is used as a filter for the GetUpdates message to tell
   // the server which datatypes to send back.  This adds a datatype so that
   // it's included in the filter.
-  static void AddToEntitySpecificDatatypesFilter(syncer::ModelType datatype,
+  static void AddToEntitySpecificDatatypesFilter(ModelType datatype,
       sync_pb::EntitySpecifics* filter);
 
   // Get a debug string representation of the client to server response.
   static std::string ClientToServerResponseDebugString(
       const sync_pb::ClientToServerResponse& response);
 
   // Get update contents as a string. Intended for logging, and intended
   // to have a smaller footprint than the protobuf's built-in pretty printer.
   static std::string SyncEntityDebugString(const sync_pb::SyncEntity& entry);
 
@@ skipping 15 matching lines @@
       const sync_pb::ClientToServerResponse* response);
 
   // Builds and sends a SyncEngineEvent to begin migration for types (specified
   // in notification).
   static void HandleMigrationDoneResponse(
       const sync_pb::ClientToServerResponse* response,
       sessions::SyncSession* session);
 
   // Post the message using the scm, and do some processing on the returned
   // headers. Decode the server response.
-  static bool PostAndProcessHeaders(syncer::ServerConnectionManager* scm,
+  static bool PostAndProcessHeaders(ServerConnectionManager* scm,
                                     sessions::SyncSession* session,
                                     const sync_pb::ClientToServerMessage& msg,
                                     sync_pb::ClientToServerResponse* response);
 
   static base::TimeDelta GetThrottleDelay(
       const sync_pb::ClientToServerResponse& response);
 
   static void HandleThrottleError(
       const SyncProtocolError& error,
       const base::TimeTicks& throttled_until,
-      syncer::ThrottledDataTypeTracker* tracker,
+      ThrottledDataTypeTracker* tracker,
       sessions::SyncSession::Delegate* delegate);
 
   friend class SyncerProtoUtilTest;
   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, AddRequestBirthday);
   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, PostAndProcessHeaders);
   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, VerifyResponseBirthday);
   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, HandleThrottlingNoDatatypes);
   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, HandleThrottlingWithDatatypes);
 
   DISALLOW_COPY_AND_ASSIGN(SyncerProtoUtil);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_ENGINE_SYNCER_PROTO_UTIL_H_