Revert r166476 that broke prerender of large number of pages.
Revert r166476 that broke prerender of large number of pages.

I'm not yet sure why, but r166476 broke rendering results of large
number of pages when prerendered, e.g.
https://www.kymmis.com/

Note that this revert will instead break some other pages like
http://answers.yahoo.com/question/index?qid=20100118183228AAfOKmD
however # of affected pages is a lot smaller than not reverting,
so let me revert it first and take a further look.

BUG=340987

Review URL: https://codereview.chromium.org/153973004

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@166817 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs