Oilpan: remove unused tracking of freelist tails.

The implementation no longer needs access to the last entry of a freelist,
hence FreeList no longer needs to record it.

R=
BUG=420515

Review URL: https://codereview.chromium.org/761243003

git-svn-id: svn://svn.chromium.org/blink/trunk@186270 bbb929c8-8fbe-4397-9dbb-9b2b20218538
2 files changed
tree: bfbde4710135ef5330d1072deddae0b028a23e6e
  1. third_party/