[Sync] Fix namespace for sync_driver component

chrome/browser/sync/glue/sync_backend_host_impl.cc

Index: chrome/browser/sync/glue/sync_backend_host_impl.cc
diff --git a/chrome/browser/sync/glue/sync_backend_host_impl.cc b/chrome/browser/sync/glue/sync_backend_host_impl.cc
index 1f500eec851174f63d5ab0894cc20cc67917e9db..8a22be9cd208e7bca14301bc2eb3dfe1ef3a4a58 100644
--- a/chrome/browser/sync/glue/sync_backend_host_impl.cc
+++ b/chrome/browser/sync/glue/sync_backend_host_impl.cc
@@ -95,7 +95,7 @@ SyncBackendHostImpl::~SyncBackendHostImpl() {
 }
 
 void SyncBackendHostImpl::Initialize(
-    SyncFrontend* frontend,
+    sync_driver::SyncFrontend* frontend,
     scoped_ptr<base::Thread> sync_thread,
     const syncer::WeakHandle<syncer::JsEventHandler>& event_handler,
     const GURL& sync_service_url,
@@ -452,7 +452,7 @@ void SyncBackendHostImpl::EnableEncryptEverything() {
 
 void SyncBackendHostImpl::ActivateDataType(
     syncer::ModelType type, syncer::ModelSafeGroup group,
-    ChangeProcessor* change_processor) {
+    sync_driver::ChangeProcessor* change_processor) {
   registrar_->ActivateDataType(type, group, change_processor, GetUserShare());
 }