AnalyzePartially already calls ResetAfterPreparsing.

BUG=v8:6093

Change-Id: Idafed85133016a6c7ba17074e269ff2ab94ff38d
Reviewed-on: https://chromium-review.googlesource.com/493387Reviewed-by: Marja Hölttä <marja@chromium.org>
Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Commit-Queue: Wiktor Garbacz <wiktorg@google.com>
Cr-Commit-Position: refs/heads/master@{#45050}