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I submitted two CLs which broke the build. Add temporary placeholder
with false bools to fix the build and restore old behavior.

Updates golang/go#22718 (details of why it broke)

Change-Id: I1f30624e14f631a95f4eff5aae462f1091f723a2
Reviewed-on: https://go-review.googlesource.com/77590

Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>