The second f1 function would overwrite the first, breaking all tests
that were intended to use the first f1 definition.

Bug: 
Change-Id: I79dd1ae344ebf3cf08991d550983f1b01274b352
Reviewed-on: https://chromium-review.googlesource.com/581528Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46856}