RTCQuicTransport uses proper buffer size constants.

This updates the RTCQuicTransport to use the proper read and write
buffer sizes that are defined in RTCQuicStream.

Bug: 874296
Change-Id: I38fb97cc19c1ed21338b8c0d6ecd03177eb602d8
Reviewed-on: https://chromium-review.googlesource.com/c/1435137
Commit-Queue: Seth Hampson <shampson@chromium.org>
Auto-Submit: Seth Hampson <shampson@chromium.org>
Reviewed-by: Steve Anton <steveanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#625942}
2 files changed