libjingle.gyp

Reland libjingle.gyp refactoring change.

Original description (from https://codereview.chromium.org/12457027/):
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=ronghuawu@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=190016

[tommi (sloooow) - chröme, 2013-03-23 15:44:24]

Hey Ronghua,

I had to revert my previous CL due to issues on linux build bots that used the
shared_library build.

The only difference here from the previous attempt is to support the component
build:

'libpeer_target_type%': 'static_library', -> 'libpeer_target_type%':
'<(component)'

[tommi (sloooow) - chröme, 2013-03-23 15:59:45]

Committed patchset #4 manually as r190016 (presubmit successful).