GitLab

This started flaking after WebRequest was moved to UI in
http://crrev.com/c/1682434. Previously, we got lucky that the beacon
requests from unloaded frames came in before the FrameData was removed
from the frame data map, since WebRequest could grab the FrameData on IO
before the beacon request started.

This CL stores recently deleted frames, and posts a task for the removal
of the deleted frame's FrameData so we have access to it when the beacon
request comes in.

Bug: 522129, 980774
Change-Id: I1fa0d16d52c52cf61d1095588882170b48ab3e32
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1713864
Commit-Queue: Clark DuVall <cduvall@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Karan Bhatia <karandeepb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#680134}