[Sync] Move //components/sync to the syncer namespace, take 2.

components/sync/driver/sync_util.h

 // Copyright 2015 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 COMPONENTS_SYNC_DRIVER_SYNC_UTIL_H_
 #define COMPONENTS_SYNC_DRIVER_SYNC_UTIL_H_
 
 #include <string>
 
 #include "components/version_info/version_info.h"
 
 class GURL;
 
 namespace base {
 class CommandLine;
 }
 
+namespace syncer {
 namespace internal {
 
 // Default sync server URL. Visible for testing.
 extern const char* kSyncServerUrl;
 
 // Sync server URL for dev channel users. Visible for testing.
 extern const char* kSyncDevServerUrl;
 
 // Formats user agent string from system string and channel. Visible for
 // testing.
 std::string FormatUserAgentForSync(const std::string& system,
                                    version_info::Channel channel);
 
 }  // namespace internal
 
 GURL GetSyncServiceURL(const base::CommandLine& command_line,
                        version_info::Channel channel);
 
 // Helper to construct a user agent string (ASCII) suitable for use by
 // the syncapi for any HTTP communication. This string is used by the sync
 // backend for classifying client types when calculating statistics.
 std::string MakeUserAgentForSync(version_info::Channel channel, bool is_tablet);
 
+}  // namespace syncer
+
 #endif  // COMPONENTS_SYNC_DRIVER_SYNC_UTIL_H_