Fix -Wshift-negative-value transgression in tcmalloc.

BUG=706476

Review-Url: https://codereview.chromium.org/2793793002
Cr-Original-Commit-Position: refs/heads/master@{#461344}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 726c89662647e7699554827c170d88f7f0543606
1 file changed
tree: 15c638bad08139fc5b19a9c35a19e404ac6b612f
  1. src/