Demote BlinkGenPropertyTrees from experimental to test

BlinkGenPropertyTrees is causing crashes and we need to investigate
them before enabling this more widely.

Bug: 913464
Change-Id: Ic9782ab8986da7b48fee2dc7701adc53a901258d
Reviewed-on: https://chromium-review.googlesource.com/c/1377070
Commit-Queue: Philip Rogers <pdr@chromium.org>
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616506}
2 files changed