broke linux builders

This reverts commit cedb8ca2.

Change-Id: I57143ec207b454bce7498a4d33f6d54464b55ab8
Reviewed-on: https://chromium-review.googlesource.com/271424Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Tested-by: Zhenyao Mo <zmo@chromium.org>