Allow proxy channels to be created without initializing the underlying channel.
This fixes a bug where a client needed to guarantee a message filter was in
place before any messages were received.
It also follows the style of not having constructors that do complex
initialization.
BUG=102894
TEST=none
Review URL: http://codereview.chromium.org/8417054
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@110229 0039d316-1c4b-4281-b951-d872f2087c98
CrOS-Libchrome-Original-Commit: 952394afc0a0dc5e3e6a1f3c2e1c0fa99b7b681f
5 files changed