Adding "adapter" ORTC objects on top of ChannelManager/BaseChannel/etc.

webrtc/pc/BUILD.gn

Index: webrtc/pc/BUILD.gn
diff --git a/webrtc/pc/BUILD.gn b/webrtc/pc/BUILD.gn
index 5aa3ae4eac43085285a84a3edec8f8a471a1dce2..8dd5d3a25a47fc56f0203e2bb7dc2402e2c4b9aa 100644
--- a/webrtc/pc/BUILD.gn
+++ b/webrtc/pc/BUILD.gn
@@ -115,8 +115,16 @@ rtc_static_library("libjingle_peerconnection") {
     "rtcstatscollector.h",
     "rtpreceiver.cc",
     "rtpreceiver.h",
+    "rtpreceivershim.cc",
+    "rtpreceivershim.h",
     "rtpsender.cc",
     "rtpsender.h",
+    "rtpsendershim.cc",
+    "rtpsendershim.h",
+    "rtptransportcontrollershim.cc",
+    "rtptransportcontrollershim.h",
+    "rtptransportshim.cc",
+    "rtptransportshim.h",
     "sctputils.cc",
     "sctputils.h",
     "statscollector.cc",
@@ -254,7 +262,7 @@ if (rtc_include_tests) {
       "localaudiosource_unittest.cc",
       "mediaconstraintsinterface_unittest.cc",
       "mediastream_unittest.cc",
-      "ortcfactory_unittest.cc",
+      "ortcfactory_integrationtest.cc",
       "peerconnection_unittest.cc",
       "peerconnectionendtoend_unittest.cc",
       "peerconnectionfactory_unittest.cc",