eroman:  I'm assuming you're not planning on taking these on?  Thinking of adding a bug to reference all of these, and tossing it into a fixit (Which I'm actually planning on holding next quarter).

I believe that is covered by the blocking bug (issue 596523).

If you agree with https://bugs.chromium.org/p/chromium/issues/detail?id=596523#c7 then I can handle these. If not we can kick it to the fixit bucket.

Oops...  Used to the old trackers double messages on linking bug dependencies, and didn't see the second message for that.

I agree with issue 596523.

I'll poke at this - look at other browsers first, then make the change.

Actually...we have like 25 places that set content.length, and a grand total of 2 that actually use it.  Maybe we can just remove it?  The download system does use it, I guess (Which matters for blobs and data URLs, at least), but I'll see how things look without it.

URLFetcher uses it in download progress events - I think we may be able to manage without it in SimpleURLLoader, though, so going to put off any removal until then.  Have a patch to fix the + issue, at least, which I will send out for review, later today.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ff4871b346b7188f232c4c346d58a4d5a4c07c93

commit ff4871b346b7188f232c4c346d58a4d5a4c07c93
Author: Matt Menke <mmenke@chromium.org>
Date: Mon Aug 06 19:33:22 2018

URLRequestJob allowed leading +'s when getting expected content size

Not only are leading +'s not allowed in the Content-Length according to
spec, our normal Content-Length parsing code doesn't allow them either.
This CL switches to using the HttpResponseHeaders Content-Length parser,
to match HttpStreamParser's behavior.

Unclear if this makes any sense for H2/QUIC, or if we should be doing
something else entirely.

Bug:  596582 
Change-Id: I0520ade19f7eaa50cb9f4aab60338a19e97a1bd4
Reviewed-on: https://chromium-review.googlesource.com/1161250
Commit-Queue: Matt Menke <mmenke@chromium.org>
Reviewed-by: Bence Béky <bnc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#580950}
[modify] https://crrev.com/ff4871b346b7188f232c4c346d58a4d5a4c07c93/net/url_request/url_request_job.cc
[modify] https://crrev.com/ff4871b346b7188f232c4c346d58a4d5a4c07c93/net/url_request/url_request_job_unittest.cc