Build WebRTC with data channel only.

webrtc/pc/BUILD.gn

Index: webrtc/pc/BUILD.gn
diff --git a/webrtc/pc/BUILD.gn b/webrtc/pc/BUILD.gn
index 8e78cafdab36248518f02be2de0ebf409fc52103..ecbffa705c2d9f50123ad8065569f81e07bfe332 100644
--- a/webrtc/pc/BUILD.gn
+++ b/webrtc/pc/BUILD.gn
@@ -147,11 +147,14 @@ rtc_static_library("libjingle_peerconnection") {
     "../api:call_api",
     "../api:rtc_stats_api",
     "../api/video_codecs:video_codecs_api",
-    "../call",
     "../media",
     "../stats",
   ]
 
+  if (rtc_enable_media) {
+    deps += [ "../call" ]
+  }
+
   public_deps = [
     "../api:libjingle_peerconnection_api",
   ]
@@ -282,32 +285,37 @@ if (rtc_include_tests) {
     testonly = true
     sources = [
       "datachannel_unittest.cc",
-      "dtmfsender_unittest.cc",
-      "fakemediacontroller.h",
       "iceserverparsing_unittest.cc",
       "jsepsessiondescription_unittest.cc",
-      "localaudiosource_unittest.cc",
-      "mediaconstraintsinterface_unittest.cc",
-      "mediastream_unittest.cc",
       "peerconnection_integrationtest.cc",
-      "peerconnectionendtoend_unittest.cc",
-      "peerconnectionfactory_unittest.cc",
-      "peerconnectioninterface_unittest.cc",
-      "proxy_unittest.cc",
-      "rtcstats_integrationtest.cc",
-      "rtcstatscollector_unittest.cc",
-      "rtpsenderreceiver_unittest.cc",
-      "sctputils_unittest.cc",
-      "statscollector_unittest.cc",
-      "test/fakeaudiocapturemodule_unittest.cc",
-      "test/testsdpstrings.h",
-      "trackmediainfomap_unittest.cc",
-      "videocapturertracksource_unittest.cc",
-      "videotrack_unittest.cc",
-      "webrtcsdp_unittest.cc",
-      "webrtcsession_unittest.cc",
     ]
 
+    if (rtc_enable_media) {
+      sources += [
+        "dtmfsender_unittest.cc",
+        "fakemediacontroller.h",
+        "localaudiosource_unittest.cc",
+        "mediaconstraintsinterface_unittest.cc",
+        "mediastream_unittest.cc",
+        "peerconnectionendtoend_unittest.cc",
+        "peerconnectionfactory_unittest.cc",
+        "peerconnectioninterface_unittest.cc",
+        "proxy_unittest.cc",
+        "rtcstats_integrationtest.cc",
+        "rtcstatscollector_unittest.cc",
+        "rtpsenderreceiver_unittest.cc",
+        "sctputils_unittest.cc",

[Taylor Brandstetter, 2017/05/03 22:50:57]

Does sctputils_unittest.cc need to be here?

[Zhi Huang, 2017/05/04 01:08:03]

No, it doesn't. Actually, if we want to avoid the duplication of build targets,
these unittests targets don't have to be changed.

+        "statscollector_unittest.cc",
+        "test/fakeaudiocapturemodule_unittest.cc",
+        "test/testsdpstrings.h",
+        "trackmediainfomap_unittest.cc",
+        "videocapturertracksource_unittest.cc",
+        "videotrack_unittest.cc",
+        "webrtcsdp_unittest.cc",
+        "webrtcsession_unittest.cc",
+      ]
+    }
+
     if (rtc_enable_sctp) {
       defines = [ "HAVE_SCTP" ]
     }