Followup commit for https://bugs.webkit.org/show_bug.cgi?id=110541
from a comment by Jon Lee.

* html/HTMLPlugInImageElement.cpp:
(WebCore::HTMLPlugInImageElement::subframeLoaderWillCreatePlugIn): Logic
in conditional was unnecessarily complex.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@143684 268f45cc-cd09-0410-ab3c-d52691b4dbfc