Use setContentSourceFromRequest() in more places

Summary: I introduced this helper at some point, clean up all the code duplication around content sources.

Test Plan: Grepped; hit edit interfaces for most/all of these.

Reviewers: btrahan, chad, edward

Reviewed By: chad

CC: aran

Differential Revision: https://secure.phabricator.com/D6030

src/applications/macro/controller/PhabricatorMacroCommentController.php

@@ -40,12 +40,7 @@ final class PhabricatorMacroCommentController
     $editor = id(new PhabricatorMacroEditor())
       ->setActor($user)
       ->setContinueOnNoEffect($request->isContinueRequest())
-      ->setContentSource(
-        PhabricatorContentSource::newForSource(
-          PhabricatorContentSource::SOURCE_WEB,
-          array(
-            'ip' => $request->getRemoteAddr(),
-          )))
+      ->setContentSourceFromRequest($request)
       ->setIsPreview($is_preview);
 
     try {