Security for online editor. Replace dev_access?, master_access? with can? method usage

app/roles/repository.rb

@@ -181,4 +181,9 @@ module Repository
   def http_url_to_repo
     http_url = [Gitlab.config.url, "/", path, ".git"].join('')
   end
+
+  # Check if current branch name is marked as protected in the system
+  def protected_branch? branch_name
+    protected_branches.map(&:name).include?(branch_name)
+  end
 end