Enabling 'gn check' on //webrtc/ortc.

BUG=webrtc:6828

Review-Url: https://codereview.webrtc.org/2804663002
Cr-Commit-Position: refs/heads/master@{#17642}
diff --git a/.gn b/.gn
index b101254..0491e43 100644
--- a/.gn
+++ b/.gn
@@ -31,6 +31,7 @@
   "//webrtc/logging/*",
   "//webrtc/media/*",
   "//webrtc/modules/*",
+  "//webrtc/ortc/*",
   "//webrtc/stats/*",
   "//webrtc/tools/*",
   "//webrtc/voice_engine/*",
diff --git a/webrtc/ortc/BUILD.gn b/webrtc/ortc/BUILD.gn
index 9e1c18f..8c23502 100644
--- a/webrtc/ortc/BUILD.gn
+++ b/webrtc/ortc/BUILD.gn
@@ -33,7 +33,16 @@
   # PeerConnection code shares, so that ortc can depend on that instead of
   # libjingle_peerconnection.
   deps = [
+    "../base:rtc_base",
+    "../base:rtc_base_approved",
+    "../call:call_interfaces",
+    "../logging:rtc_event_log_api",
+    "../media:rtc_media",
+    "../media:rtc_media_base",
+    "../modules/audio_coding:builtin_audio_decoder_factory",
+    "../p2p:rtc_p2p",
     "../pc:libjingle_peerconnection",
+    "../pc:rtc_pc",
   ]
 
   public_deps = [
@@ -65,8 +74,12 @@
 
     deps = [
       ":ortc",
+      "../base:rtc_base",
+      "../base:rtc_base_approved",
       "../base:rtc_base_tests_utils",
       "../media:rtc_unittest_main",
+      "../p2p:rtc_p2p",
+      "../p2p:rtc_p2p_unittests",
       "../pc:pc_test_utils",
       "../system_wrappers:metrics_default",
     ]