unified-heap: Avoid scheduling a stand-alone GC after a V8 GC

Bug: 843903
Change-Id: I24d73949caec0b2ea55cf6cfa058cbf5f7d2826a
Reviewed-on: https://chromium-review.googlesource.com/c/1355941
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612681}
1 file changed