Oilpan: Compile error with GYP_DEFINES='gc_profile_marking=1'

1. change the ENABLE(GC_TRACING) to ENABLE(GC_PROFILE_MARKING).

R=ager@chromium.org, oilpan-reviews@chromium.org
BUG=405009

Review URL: https://codereview.chromium.org/466363003

git-svn-id: svn://svn.chromium.org/blink/trunk@180623 bbb929c8-8fbe-4397-9dbb-9b2b20218538