Escape NetLog strings for SPDY debug_data.

Bug: 914874
Change-Id: I34695d179dd9132b9a1412ecdc2b0260cd3b886f
Reviewed-on: https://chromium-review.googlesource.com/c/1376850
Reviewed-by: Bence Béky <bnc@chromium.org>
Commit-Queue: Eric Roman <eroman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616510}
4 files changed