Add arraysize to overrides to avoid macros redefinitions in Chromium

This fixes the Webrtc in Chrome FYI bots breaking.

TBR=ajm

Review URL: https://webrtc-codereview.appspot.com/36149004

Cr-Original-Commit-Position: refs/heads/master@{#8371}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 30142bbe071206599fdb69e88b92b22c38c1354a
1 file changed