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-by: Carlos Knippschild <>
Commit-Queue: Dan H <>
Cr-Commit-Position: refs/heads/master@{#643381}
1 file changed