Backport changes to API::ProtectedBranches

This backports EE specific parameters EE adds to API::ProtectedBranches,
and wraps them in a conditional.

lib/api/protected_branches.rb

@@ -51,6 +51,30 @@ module API
         optional :merge_access_level, type: Integer,
                                       values: ProtectedBranch::MergeAccessLevel.allowed_access_levels,
                                       desc: 'Access levels allowed to merge (defaults: `40`, maintainer access level)'
+
+        if Gitlab.ee?
+          optional :unprotect_access_level, type: Integer,
+                                            values: ProtectedBranch::UnprotectAccessLevel.allowed_access_levels,
+                                            desc: 'Access levels allowed to unprotect (defaults: `40`, maintainer access level)'
+
+          optional :allowed_to_push, type: Array, desc: 'An array of users/groups allowed to push' do
+            optional :access_level, type: Integer, values: ProtectedBranch::PushAccessLevel.allowed_access_levels
+            optional :user_id, type: Integer
+            optional :group_id, type: Integer
+          end
+
+          optional :allowed_to_merge, type: Array, desc: 'An array of users/groups allowed to merge' do
+            optional :access_level, type: Integer, values: ProtectedBranch::MergeAccessLevel.allowed_access_levels
+            optional :user_id, type: Integer
+            optional :group_id, type: Integer
+          end
+
+          optional :allowed_to_unprotect, type: Array, desc: 'An array of users/groups allowed to unprotect' do
+            optional :access_level, type: Integer, values: ProtectedBranch::UnprotectAccessLevel.allowed_access_levels
+            optional :user_id, type: Integer
+            optional :group_id, type: Integer
+          end
+        end
       end
       # rubocop: disable CodeReuse/ActiveRecord
       post ':id/protected_branches' do