Remove the use of aura::Window::env() from chrome and content

Bug: 958467
Test: trybot
Change-Id: Ic5e4be9a6e30c215852abeb4b60d97209ed6e9fd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1614440
Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Jun Mukai <mukai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#660469}
8 files changed