Use assert_instances_of() everywhere but Differential and Diffusion

Summary: NOTE: This is not produced by a script so there might be errors. Please review carefully.

Test Plan: Browse around.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran

Differential Revision: https://secure.phabricator.com/D2091

src/applications/project/controller/profile/PhabricatorProjectProfileController.php

@@ -270,6 +270,7 @@ final class PhabricatorProjectProfileController
   }
 
   private function renderStories(array $stories) {
+    assert_instances_of($stories, 'PhabricatorFeedStory');
 
     $builder = new PhabricatorFeedBuilder($stories);
     $builder->setUser($this->getRequest()->getUser());