Fix visibility of ConduitAPIMethod::execute methods

Summary: Ref T6822. These methods should be `protected`.

Test Plan: `grep`

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin, epriestley

Maniphest Tasks: T6822

Differential Revision: https://secure.phabricator.com/D11407

src/applications/tokens/conduit/TokenGiveConduitAPIMethod.php

@@ -25,7 +25,7 @@ final class TokenGiveConduitAPIMethod extends TokenConduitAPIMethod {
     return 'void';
   }
 
-  public function execute(ConduitAPIRequest $request) {
+  protected function execute(ConduitAPIRequest $request) {
     $content_source = PhabricatorContentSource::newFromConduitRequest($request);
 
     $editor = id(new PhabricatorTokenGivenEditor())

src/applications/tokens/conduit/TokenGivenConduitAPIMethod.php

@@ -26,7 +26,7 @@ final class TokenGivenConduitAPIMethod extends TokenConduitAPIMethod {
     return 'list<dict>';
   }
 
-  public function execute(ConduitAPIRequest $request) {
+  protected function execute(ConduitAPIRequest $request) {
     $query = id(new PhabricatorTokenGivenQuery())
       ->setViewer($request->getUser());
 

src/applications/tokens/conduit/TokenQueryConduitAPIMethod.php

@@ -22,7 +22,7 @@ final class TokenQueryConduitAPIMethod extends TokenConduitAPIMethod {
     return array();
   }
 
-  public function execute(ConduitAPIRequest $request) {
+  protected function execute(ConduitAPIRequest $request) {
     $query = id(new PhabricatorTokenQuery())
       ->setViewer($request->getUser());