Check that prefetching page downloads are not range requests

We shouldn't use range requests unless requesting a partial range after
initially downloading some of the page. If we do initially request a range
request, the server may not cache the result.

Change-Id: Icccd57ba7fa7180383c487e1843dfdd2b8179c35
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1534285
Reviewed-by: Carlos Knippschild <carlosk@chromium.org>
Commit-Queue: Dan H <harringtond@google.com>
Cr-Commit-Position: refs/heads/master@{#643381}
1 file changed