Fix the System Profile to not load extensions. It could otherwise be forced to by GPO.

chrome/browser/extensions/tab_helper.cc

Index: chrome/browser/extensions/tab_helper.cc
diff --git a/chrome/browser/extensions/tab_helper.cc b/chrome/browser/extensions/tab_helper.cc
index 1e551c46db2168ab1e66dbecf0fb0dab474587c6..0f2778be40b45377b4df390bf26b3d147f51f5d2 100644
--- a/chrome/browser/extensions/tab_helper.cc
+++ b/chrome/browser/extensions/tab_helper.cc
@@ -144,6 +144,7 @@ bool TabHelper::CanCreateApplicationShortcuts() const {
 
 bool TabHelper::CanCreateBookmarkApp() const {
   return !profile_->IsGuestSession() &&
+         !profile_->IsSystemProfile() &&
          IsValidBookmarkAppUrl(web_contents()->GetURL());
 }