Update for RTCQuicStream.write() function.

Combines functionality of finish() into write() by adding a new
QuicStreamWriteParameters input parameter that includes a finish
boolean. This is consistent with the latest spec draft and also adds
symmetry between readInto() and write().

Bug: 874296
Change-Id: I0def0ca25587ebf00a4b179ce8e9e7a124c818f6
Reviewed-on: https://chromium-review.googlesource.com/c/1376720
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Steve Anton <steveanton@chromium.org>
Commit-Queue: Seth Hampson <shampson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616941}
9 files changed