clang/win: Enable -Wunused-local-typedef

BUG=411648
TBR=jam

Review URL: https://codereview.chromium.org/1236863009

Cr-Original-Commit-Position: refs/heads/master@{#339470}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 803f983242c850986820e2f8de8a2f403086bea9
2 files changed