remove valgrind checks from //base

We have not supported valgrind for some time (it was never ported to
the GN build IIUC, and has been obsoleted by ASan/MSan/TSan).

BUG=791518,431702

Change-Id: Ibfad450ee2973cf5916986559f543aced08e108a
Reviewed-on: https://chromium-review.googlesource.com/805894
Reviewed-by: danakj <danakj@chromium.org>
Commit-Queue: Mostyn Bramley-Moore <mostynb@vewd.com>
Cr-Commit-Position: refs/heads/master@{#522154}

CrOS-Libchrome-Original-Commit: d0ecd6a5404c1f7b2b3b9ed0d6bad66fdbceb529
13 files changed
tree: becd5a653a99ff04592f38783a7de5257fefbc04
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/