Cover redirects to files in more cases

Summary: Ref T5894. We have a couple more similar cases. Make them all do a decision-based redirect for now.

Test Plan: Did "View Raw File" and such, and also made sure thumbnails still work.

Reviewers: btrahan, chad

Reviewed By: chad

Subscribers: epriestley

Maniphest Tasks: T5894

Differential Revision: https://secure.phabricator.com/D10301

src/applications/differential/controller/DifferentialChangesetViewController.php

@@ -347,8 +347,7 @@ final class DifferentialChangesetViewController extends DifferentialController {
       unset($unguard);
     }
 
-    return id(new AphrontRedirectResponse())
-      ->setURI($file->getBestURI());
+    return $file->getRedirectResponse();
   }
 
   private function buildLintInlineComments($changeset) {