Fix Gn untracked headers in webrtc/p2p

p2p/BUILD.gn

Index: p2p/BUILD.gn
diff --git a/p2p/BUILD.gn b/p2p/BUILD.gn
index 9223f865b4a304309857af5af01c44678b698a97..ea3bd9162044b8f751c8495c8cf6a422a3eca687 100644
--- a/p2p/BUILD.gn
+++ b/p2p/BUILD.gn
@@ -26,6 +26,7 @@ rtc_static_library("rtc_p2p") {
     "base/basicpacketsocketfactory.cc",
     "base/basicpacketsocketfactory.h",
     "base/candidate.h",
+    "base/candidatepairinterface.h",
     "base/common.h",
     "base/dtlstransport.cc",
     "base/dtlstransport.h",
@@ -123,6 +124,7 @@ rtc_static_library("rtc_p2p") {
       "//third_party/libquic",
     ]
     sources += [
+      "base/transportchannelimpl.h",

[mbonadei, 2017/09/19 09:04:50]

I am missing some context here so maybe this is a trivial question.
Why this has been added in this if branch (only when rtc_use_quic is true)?

[kjellander_webrtc, 2017/09/19 16:10:28]

Seems like it's only included in the code in this section:
https://cs.chromium.org/chromium/src/third_party/webrtc/p2p/quic/quictranspor...

Adding Taylor for input on this. Maybe moving the header first is better (e.g.
into p2p/quic)

       "quic/quicconnectionhelper.cc",
       "quic/quicconnectionhelper.h",
       "quic/quicsession.cc",
@@ -228,6 +230,7 @@ if (rtc_include_tests) {
 rtc_static_library("libstunprober") {
   sources = [
     "stunprober/stunprober.cc",
+    "stunprober/stunprober.h",
   ]
 
   if (!build_with_chromium && is_clang) {