Use Application PHIDs in Maniphest

Summary: Ref T2715. Switch Maniphest to the new stuff.

Test Plan: Used `phid.query`; `phid.lookup` to load objects.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T2715

Differential Revision: https://secure.phabricator.com/D6516

src/applications/search/controller/PhabricatorSearchSelectController.php

@@ -67,7 +67,7 @@ final class PhabricatorSearchSelectController
 
     $pattern = null;
     switch ($this->type) {
-      case PhabricatorPHIDConstants::PHID_TYPE_TASK:
+      case ManiphestPHIDTypeTask::TYPECONST:
         $pattern = '/\bT(\d+)\b/i';
         break;
       case DifferentialPHIDTypeRevision::TYPECONST:
@@ -99,7 +99,7 @@ final class PhabricatorSearchSelectController
           'id IN (%Ld)',
           $object_ids);
         break;
-      case PhabricatorPHIDConstants::PHID_TYPE_TASK:
+      case ManiphestPHIDTypeTask::TYPECONST:
         $objects = id(new ManiphestTask())->loadAllWhere(
           'id IN (%Ld)',
           $object_ids);