Dawn: use Dawn's temporary test targets for isolates.

The plan is to move the actual test targets in Dawn to Dawn's
src/test directory. This change makes Chrome temporarily point at
some intermediate proxy targets, so we can move the real ones
without breaking Chrome.

Bug: dawn:61
Change-Id: I27a66a0daffe212da3fe2a0aaba7d4a250a376ea
Reviewed-on: https://chromium-review.googlesource.com/c/1373892
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#615895}
1 file changed