Temporarily disable -Werror in Chromium.

Temporarily disable the use of -Werror in the AOSP copy of Chromium so
that the system-wide default warnings can be changed without breaking
Chromium. We'll re-enable it once the warnings are settled and we've
fixed any issues.

Bug: 18632512
Change-Id: I97dce9f3178888b2901f1cda7ce818cdf4295198
8 files changed