Hijacking the gyp inside_chromium_build finally came back to bite us.
Chrome started using it to control the path to the gold linker, which
broke our build. This change removes use of inside_chromium_build from
WebRTC.
If peerconnection rolls past this point, libjingle.gyp will need to be updated.
BUG=
TEST=build on Linux, Mac, Win
Review URL: https://webrtc-codereview.appspot.com/493007
git-svn-id: http://webrtc.googlecode.com/svn/trunk@2038 4adac7df-926f-26a2-2b94-8c16560cd09d
