GitLab

Add the window property kWindowIdKey as the window id for the full
restore data.

Implement the SaveWindowInfo interface to save the browser session id
as the window id.

BUG=1146900

Change-Id: I4fbe4fe85ec5bf0a15e4576dd7d3d565b830c7aa
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2597519
Commit-Queue: Nancy Wang <nancylingwang@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#840845}