This CL removes a GC invocation which might not be needed anymore.

Change-Id: I27c57936677ba2ec0bc32588c485a2c3b6ffed01
Reviewed-on: https://chromium-review.googlesource.com/928241Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51428}