Fixing options parser.

TBR=kjellander@chromium.org
BUG=360516

Review URL: https://codereview.chromium.org/886383002

git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/webrtc/webrtc.DEPS@293901 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
diff --git a/download_firefox_nightly.py b/download_firefox_nightly.py
index db61914..7f0aa5a 100755
--- a/download_firefox_nightly.py
+++ b/download_firefox_nightly.py
@@ -154,7 +154,7 @@
   if firefox_archive:
     return _ExtractArchive(firefox_archive, target_dir)
 
-  if options.clean_old_archives:
+  if options.clean_old_firefox_archives:
     _CleanOldFirefoxArchives(target_dir)
 
 if __name__ == '__main__':