Delete references to obsolete webrtc header files.

third_party/libjingle/BUILD.gn

Index: third_party/libjingle/BUILD.gn
diff --git a/third_party/libjingle/BUILD.gn b/third_party/libjingle/BUILD.gn
index c019fa553d0ec398cfa614d47a0f81021510cfd1..ac58864842be309e3d9c52e9cf30be4970440925 100644
--- a/third_party/libjingle/BUILD.gn
+++ b/third_party/libjingle/BUILD.gn
@@ -127,10 +127,6 @@ static_library("libjingle") {
     "$p2p_dir/base/portallocator.h",
     "$p2p_dir/base/pseudotcp.cc",
     "$p2p_dir/base/pseudotcp.h",
-    "$p2p_dir/base/rawtransport.cc",
-    "$p2p_dir/base/rawtransport.h",
-    "$p2p_dir/base/rawtransportchannel.cc",
-    "$p2p_dir/base/rawtransportchannel.h",
     "$p2p_dir/base/relayport.cc",
     "$p2p_dir/base/relayport.h",
     "$p2p_dir/base/session.cc",
@@ -272,8 +268,6 @@ if (enable_webrtc) {
       "../webrtc/api/mediacontroller.h",
       "../webrtc/api/mediastream.cc",
       "../webrtc/api/mediastream.h",
-      "../webrtc/api/mediastreamhandler.cc",
-      "../webrtc/api/mediastreamhandler.h",
       "../webrtc/api/mediastreaminterface.h",
       "../webrtc/api/mediastreamobserver.cc",
       "../webrtc/api/mediastreamobserver.h",
@@ -291,8 +285,6 @@ if (enable_webrtc) {
       "../webrtc/api/portallocatorfactory.h",
       "../webrtc/api/remoteaudiosource.cc",
       "../webrtc/api/remoteaudiosource.h",
-      "../webrtc/api/remoteaudiotrack.cc",
-      "../webrtc/api/remoteaudiotrack.h",
       "../webrtc/api/rtpreceiver.cc",
       "../webrtc/api/rtpreceiver.h",
       "../webrtc/api/rtpreceiverinterface.h",
@@ -320,7 +312,6 @@ if (enable_webrtc) {
       "../webrtc/api/webrtcsession.h",
       "../webrtc/api/webrtcsessiondescriptionfactory.cc",
       "../webrtc/api/webrtcsessiondescriptionfactory.h",
-      "../webrtc/media/base/audiorenderer.h",
       "../webrtc/media/base/codec.cc",
       "../webrtc/media/base/codec.h",
       "../webrtc/media/base/cryptoparams.h",