Fix findings of wvla-cxx-extension

This CL fixes occurances of the wvla-cxx-extension warning in
platform/gestures. This is a newly introduced warning in Clang and
existing occurances in ChromeOS break compatibility with future releases
of LLVM.

BUG=b:316021385
TEST=emerge-atlas chromeos-base/gestures

Change-Id: If0eb2999d8a5abc3a367dc1c863d53258804d721
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/gestures/+/5160432
Reviewed-by: Harry Cutts <hcutts@chromium.org>
Commit-Queue: Ryan Beltran <ryanbeltran@chromium.org>
Code-Coverage: Sean O'Brien <seobrien@chromium.org>
Tested-by: Ryan Beltran <ryanbeltran@chromium.org>
5 files changed