tree f155e44c7b3317193545c23965c117155c7ce44d
parent 1dca8f4626c77eed34c900e25f3e15e8b48d7b11
author Suharsh Sivakumar <suharshs@google.com> 1452106039 -0800
committer Suharsh Sivakumar <suharshs@google.com> 1452106345 -0800

ref: Set root cancel on context of encapsulated flows in Conn.

Proxied RPCs were failing in the following scenario:
A starts proxied RPC 1 to B with ctx, cancel.
A starts proxied RPC 2 to B.
RPC 1 completes and A calls cancel.
RPC 2 fails.

This was happening because cancel was closing the encapsulated proxy
flow. The solution is to use SetDeadlineContext to set the ctx on
the flow the RootCancel context used in the setup of the encapsulating
Conn.

Change-Id: I56455d52ee6dcd579fa1e92c00ce63ddb49e18f9