In addition to a git grep I ran the
virtual/enable_wasm_streaming/http/tests/wasm_streaming/wasm_response_apis.html
layout test locally to confirm that the flag is not used in Chrome.

R=titzer@chromium.org

Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
Change-Id: I00d013b85b585d26e50aacaeb82fb0b1ce1ff56c
Reviewed-on: https://chromium-review.googlesource.com/1049965Reviewed-by: Ben Titzer <titzer@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53072}