GitLab

These have recently been retired from Valgrind, and are also being retired from Dr Memory:

bug_241044
bug_246153
bug_312332
bug_327672

BUG=241044,246153,312332,327672
R=bruening@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/587133003

Cr-Commit-Position: refs/heads/master@{#296049}