arc: Dont sync app list change caused by Arc opt out.

chrome/browser/ui/app_list/app_list_model_builder.cc

Index: chrome/browser/ui/app_list/app_list_model_builder.cc
diff --git a/chrome/browser/ui/app_list/app_list_model_builder.cc b/chrome/browser/ui/app_list/app_list_model_builder.cc
index b223dee321b50fea3a0d08ac743fe913b313bf78..636810e1f7467121204ce47c86a1040c097a2005 100644
--- a/chrome/browser/ui/app_list/app_list_model_builder.cc
+++ b/chrome/browser/ui/app_list/app_list_model_builder.cc
@@ -51,8 +51,8 @@ void AppListModelBuilder::InsertApp(
   model_->AddItem(std::move(app));
 }
 
-void AppListModelBuilder::RemoveApp(const std::string& id) {
-  if (service_) {
+void AppListModelBuilder::RemoveApp(const std::string& id, bool local_change) {
+  if (!local_change && service_) {
     service_->RemoveUninstalledItem(id);
     return;
   }