DevTools: support cookies in URLLoader-based network interceptor

Bug: 850689,838291
Cq-Include-Trybots: luci.chromium.try:linux_mojo
Change-Id: I4017d89466de05936b697385436e6519934a9f19
Reviewed-on: https://chromium-review.googlesource.com/c/1282443
Commit-Queue: Andrey Kosyakov <caseq@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#600907}
8 files changed