Restructure public side of network service.

Restructure public side of network service.

This CL goes from this:
  //mojo/services/public/cpp/network
  //mojo/services/public/interfaces/network

to this:
  //mojo/services/network/public/cpp
  //mojo/services/network/public/interfaces

This CL also makes the Mojo-side changes required to roll this change into
Chromium.

TBR=beng

Committed: https://chromium.googlesource.com/external/mojo/+/b470fa115a98682e0e67f1c1c5a1817ba49672eb

[blundell, 2014-12-10 15:13:57]

the hits keep on coming

[blundell, 2014-12-10 15:28:48]

Committed patchset #4 (id:60001) manually as
b470fa115a98682e0e67f1c1c5a1817ba49672eb (presubmit successful).

[Ben Goodger (Google), 2014-12-10 21:36:30]

ben@chromium.org changed reviewers:
+ ben@chromium.org

[Ben Goodger (Google), 2014-12-10 21:36:31]

lgtm