Fix some method visibilities

Summary: See D13185, the `testMethodVisibility()` test was not being executed.

Test Plan: `arc unit`

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D13186

src/applications/spaces/view/PhabricatorSpacesControl.php

@@ -28,7 +28,7 @@ final class PhabricatorSpacesControl extends AphrontFormControl {
     return $map;
   }
 
-  public function renderInput() {
+  protected function renderInput() {
     $viewer = $this->getUser();
 
     $this->setLabel(pht('Space'));