Don't build chrome with debug symbols on chrome-perf build types.
Don't build chrome with debug symbols on chrome-perf build types.

We want these builds to build as quickly as possible so that we can
vet them against performance benchmarks. We do not need symbols for this
to work and just takes extra time.

BUG=chromium-os:35895
TEST=Running a local trybot run + unittest + pylint

Change-Id: I975ca1fb4496ac6d748fa8798edd42403a695902
Reviewed-on: https://gerrit.chromium.org/gerrit/37063
Commit-Ready: Chris Sosa <959d3d631fb6f17f1b07f751372041a1edb210d1@chromium.org>
Reviewed-by: Chris Sosa <959d3d631fb6f17f1b07f751372041a1edb210d1@chromium.org>
Tested-by: Chris Sosa <959d3d631fb6f17f1b07f751372041a1edb210d1@chromium.org>

chadversary/chromiumos.chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite,zhang0137/chromite,coreos/chromite,zhang0137/chromite,chadversary/chromiumos.chromite,zhang0137/chromite,coreos/chromite,bpsinc-native/src_third_party_chromite,coreos/chromite