TrackMediaInfoMap added.

webrtc/api/BUILD.gn

Index: webrtc/api/BUILD.gn
diff --git a/webrtc/api/BUILD.gn b/webrtc/api/BUILD.gn
index 7c5e302d65bffbaae88c7f89e9744ccb9eded22a..149fd51e0b4b7c400e497c09f7a9a009ff9e3aa1 100644
--- a/webrtc/api/BUILD.gn
+++ b/webrtc/api/BUILD.gn
@@ -101,6 +101,8 @@ rtc_static_library("libjingle_peerconnection") {
     "statstypes.cc",
     "statstypes.h",
     "streamcollection.h",
+    "trackmediainfomap.cc",
+    "trackmediainfomap.h",
     "videocapturertracksource.cc",
     "videocapturertracksource.h",
     "videosourceproxy.h",
@@ -254,12 +256,15 @@ if (rtc_include_tests) {
       "test/fakevideotrackrenderer.h",
       "test/mock_datachannel.h",
       "test/mock_peerconnection.h",
+      "test/mock_rtpreceiver.h",
+      "test/mock_rtpsender.h",
       "test/mock_webrtcsession.h",
       "test/mockpeerconnectionobservers.h",
       "test/peerconnectiontestwrapper.cc",
       "test/peerconnectiontestwrapper.h",
       "test/rtcstatsobtainer.h",
       "test/testsdpstrings.h",
+      "trackmediainfomap_unittest.cc",
       "videocapturertracksource_unittest.cc",
       "videotrack_unittest.cc",
       "webrtcsdp_unittest.cc",