Do not create login items if the user deleted a previous one.

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 04138b1d2562b87f31d6aec902b1525ba11c4f0b..eb472902d260394638ed61775118fdc0927a0a8f 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -1921,6 +1921,10 @@ const char kManagedAutoSelectCertificateForUrls[] =
 // uninstalling background apps.
 const char kUserCreatedLoginItem[] = "background_mode.user_created_login_item";
 
+// Set to true if the user removed our login item so we should not create a new
+// one when uninstalling background apps.
+const char kUserRemovedLoginItem[] = "background_mode.user_removed_login_item";
+
 // Set to true if background mode is enabled on this browser.
 const char kBackgroundModeEnabled[] = "background_mode.enabled";