Async Cookies: Fix globals in idlharness test

Globals (Window, ServiceWorkerGlobalScope, etc) get special bindings
treatment for methods/properties and IDL tests for features need to
declare these types correctly for correct results. Fix the SW test for
the new cookie store API by marking the global with the [Global]
extended attribute; this reveals that our implementation passes all
the bindings test cases.

Bug: 729800
Change-Id: I87747ed2af8d932342e24c9400524d88c9df73a7
Reviewed-on: https://chromium-review.googlesource.com/914568
Commit-Queue: Victor Costan <pwnall@chromium.org>
Reviewed-by: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#536189}
3 files changed