Oilpan: Remove unnecessary trace methods in the supplement hierarchy.

R=tkent@chromium.org
BUG=

Review URL: https://codereview.chromium.org/270213006

git-svn-id: svn://svn.chromium.org/blink/trunk@173617 bbb929c8-8fbe-4397-9dbb-9b2b20218538