Revert 189990 - re-re-land of "Refactor libjingle and libpeerconn..."

Revert 189990 - re-re-land of "Refactor libjingle and libpeerconn..."
The previous attempt failed because libjingle hadn't been rolled yet. Still waiting on trybots a day later.

> > > > Refactor libjingle and libpeerconnection targets.
> > > > I'm moving most of the source files back to the libjingle target since the current splitting doesn't work for all targets that currently rely on libjingle.  The webrtc core libs are still only in the libpeerconnection target, and require the enable_webrtc gyp variable to be be set.
> > > > 
> > > > I'm also adding a gyp variable to the libjingle target to support dependency injection as is supported for libpeerconnection.
> > > > 
> > > > TBR=darin
> > > > 
> > > > Review URL: https://codereview.chromium.org/12457027
> > > 
> > > TBR=tommi@chromium.org
> > > Review URL: https://codereview.chromium.org/12662028

TBR=tommi@chromium.org
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=189995

[tommi (sloooow) - chröme, 2013-03-23 08:35:58]

Committed patchset #1 manually as r189995.