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

components/sync/device_info/device_info.cc

Index: components/sync/device_info/device_info.cc
diff --git a/components/sync/device_info/device_info.cc b/components/sync/device_info/device_info.cc
index 70c699c2a4ec976c197eaf0e0cd8d2cd5b882890..309de60fe45e1d56d00b2548abfc556adaaf487f 100644
--- a/components/sync/device_info/device_info.cc
+++ b/components/sync/device_info/device_info.cc
@@ -6,7 +6,7 @@
 
 #include "base/values.h"
 
-namespace sync_driver {
+namespace syncer {
 
 DeviceInfo::DeviceInfo(const std::string& guid,
                        const std::string& client_name,
@@ -110,4 +110,4 @@ void DeviceInfo::set_public_id(const std::string& id) {
   public_id_ = id;
 }
 
-}  // namespace sync_driver
+}  // namespace syncer