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

components/sync/device_info/local_device_info_provider_mock.cc

Index: components/sync/device_info/local_device_info_provider_mock.cc
diff --git a/components/sync/device_info/local_device_info_provider_mock.cc b/components/sync/device_info/local_device_info_provider_mock.cc
index fa45cad05cd7def9a23793660bae98341576e1dd..544c6e5aa9961fbe59a993b18a7f309030538193 100644
--- a/components/sync/device_info/local_device_info_provider_mock.cc
+++ b/components/sync/device_info/local_device_info_provider_mock.cc
@@ -4,7 +4,7 @@
 
 #include "components/sync/device_info/local_device_info_provider_mock.h"
 
-namespace sync_driver {
+namespace syncer {
 
 LocalDeviceInfoProviderMock::LocalDeviceInfoProviderMock()
     : is_initialized_(false) {}
@@ -71,4 +71,4 @@ void LocalDeviceInfoProviderMock::SetInitialized(bool is_initialized) {
   }
 }
 
-}  // namespace sync_driver
+}  // namespace syncer