tree bd75319c31c269458d9651b0f7215ca09a8d3dc4
parent 4668e56af54214b221b6c4a9f52151378f898ca1
author Matt Rosencrantz <mattr@google.com> 1442005733 -0700
committer Matt Rosencrantz <mattr@google.com> 1442005733 -0700

ref: Allow open messages to carry a payload so we don't have to
send two messages at the start of a flow.

This speeds up the single RPC latency between 1.5% and 9%.

MultiPart: 1/2

Change-Id: Ie4356a2c07b221cbec86c26f333f44f2ab5d4bbc