GitLab

Posting headers gotten on IO thread from NetworkDelegate off to UI thread
isn't guaranteed to work (since the IO thread is still using them!); so
instead extract out the bits that are actually needed immediately.

Bug: 840235
Change-Id: I067378ab1fee252af6c6cbd7562b75776477e979
Reviewed-on: https://chromium-review.googlesource.com/1057875Reviewed-by: Richard Coles <torne@chromium.org>
Commit-Queue: Maks Orlovich <morlovich@chromium.org>
Cr-Commit-Position: refs/heads/master@{#558747}