Fix visibility of various ArcanistWorkflow methods

Summary: Ref T6822.

Test Plan: Visual inspection. These methods are only called from within the `ArcanistShellCompleteWorkflow` class.

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin, epriestley

Maniphest Tasks: T6822

Differential Revision: https://secure.phabricator.com/D11238

src/workflow/ArcanistCallConduitWorkflow.php

@@ -40,7 +40,7 @@ EOTEXT
     );
   }
 
-  public function shouldShellComplete() {
+  protected function shouldShellComplete() {
     return false;
   }
 

src/workflow/ArcanistGitHookPreReceiveWorkflow.php

@@ -37,7 +37,7 @@ EOTEXT
     return true;
   }
 
-  public function shouldShellComplete() {
+  protected function shouldShellComplete() {
     return false;
   }
 

src/workflow/ArcanistInstallCertificateWorkflow.php

@@ -35,7 +35,7 @@ EOTEXT
     );
   }
 
-  public function shouldShellComplete() {
+  protected function shouldShellComplete() {
     return false;
   }
 

src/workflow/ArcanistPatchWorkflow.php

@@ -834,7 +834,7 @@ EOTEXT
     return $commit_message;
   }
 
-  public function getShellCompletions(array $argv) {
+  protected function getShellCompletions(array $argv) {
     // TODO: Pull open diffs from 'arc list'?
     return array('ARGUMENT');
   }

src/workflow/ArcanistShellCompleteWorkflow.php

@@ -36,7 +36,7 @@ EOTEXT
     );
   }
 
-  public function shouldShellComplete() {
+  protected function shouldShellComplete() {
     return false;
   }
 

src/workflow/ArcanistSvnHookPreCommitWorkflow.php

@@ -32,7 +32,7 @@ EOTEXT
     );
   }
 
-  public function shouldShellComplete() {
+  protected function shouldShellComplete() {
     return false;
   }