Mojo: Give ChannelEndpoint the remote ID and ProxyMessagePipeEndpoint the ChannelEndpoint.

Mojo: Give ChannelEndpoint the remote ID and ProxyMessagePipeEndpoint the ChannelEndpoint.

Witht this, I can begin removing knowledge of the Channel, etc. from the
ProxyMessagePipeEndpoint. (Eventually, ProxyMessagePipeEndpoint will
really just look like a stupid proxy, and relative sanity will prevail.)

R=darin@chromium.org

Committed: https://crrev.com/b1559135b834fdeac19dd25295d8e316637b3643
Cr-Commit-Position: refs/heads/master@{#295497}

[darin (slow to review), 2014-09-18 17:23:23]

lgtm

[viettrungluu, 2014-09-18 17:31:46]

The CQ bit was checked by viettrungluu@chromium.org

[commit-bot: I haz the power, 2014-09-18 17:33:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/577313002/1

[commit-bot: I haz the power, 2014-09-18 18:17:10]

Committed patchset #1 (id:1) as 384d081816fe30746e81dc2253d207a6044024b9

[commit-bot: I haz the power, 2014-09-18 18:17:41]

Patchset 1 (id:??) landed as
https://crrev.com/b1559135b834fdeac19dd25295d8e316637b3643
Cr-Commit-Position: refs/heads/master@{#295497}