[Gin] Add feature to control optimization in V8.

Change-Id: I7ff3a987d132d4ca8e0f350e851020b53d4fb009
Reviewed-on: https://chromium-review.googlesource.com/980947
Commit-Queue: Ross McIlroy <[email protected]>
Reviewed-by: Mythri Alle <[email protected]>
Cr-Commit-Position: refs/heads/master@{#546143}
4 files changed