GN: New conventions, default target and refactorings

webrtc/p2p/BUILD.gn

 # Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("../build/webrtc.gni")
 
 group("p2p") {
   public_deps = [
+    ":libstunprober",
     ":rtc_p2p",
   ]
+  if (!build_with_chromium) {
+    # TODO(kjellander): Move this to examples or tools.
+    public_deps += [ ":stun_prober" ]
+  }
 }
 
 config("rtc_p2p_inherited_config") {
   defines = [ "FEATURE_ENABLE_VOICEMAIL" ]
 }
 
 rtc_static_library("rtc_p2p") {
   sources = [
     "base/asyncstuntcpsocket.cc",
     "base/asyncstuntcpsocket.h",
@@ skipping 143 matching lines @@
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
 
     deps = [
       ":libstunprober",
       ":rtc_p2p",
       "../system_wrappers:field_trial_default",
     ]
   }
 }