Add ChannelProxy benchmark to ipc_perftests.
This CL add a ChannelProxy equivalent of the Channel benchmark
to ipc_perftests.
To use it in the benchmark, TestIOThread is extracted from
mojo/system/ to base/test
TEST=IPChannelPerfTest.ChannelProxyPingPong
R=viettrungluu@chromium.org,brettw@chromium.org,darin@chromium.org
BUG=none
Review URL: https://codereview.chromium.org/488003003
Cr-Commit-Position: refs/heads/master@{#292518}
CrOS-Libchrome-Original-Commit: d36736cd2b6763bc9eb4e089b07fff0e8d1c534c
15 files changed