Oilpan: Replace return values and arguments of cloneNode, adoptNode, and their related functions with Oilpan transition types.

BUG=357163

Review URL: https://codereview.chromium.org/282783006

git-svn-id: svn://svn.chromium.org/blink/trunk@173955 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Simplify http/tests/resources/origin.php

Vaguely hoping that this will fix bug 341435

R=abarth@chromium.org,yoav@yoav.ws
BUG=341435

Review URL: https://codereview.chromium.org/288493006

git-svn-id: svn://svn.chromium.org/blink/trunk@173956 bbb929c8-8fbe-4397-9dbb-9b2b20218538