GN: New conventions, default target and refactorings

webrtc/examples/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")
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
 } else if (is_mac) {
   import("//build/config/mac/rules.gni")
 } else if (is_ios) {
   import("//build/config/ios/rules.gni")
 }
 if (is_linux) {
   import("//build/config/linux/pkg_config.gni")
 }
 
 group("examples") {
+  # This target shall build all targets in examples.
+  testonly = true
   public_deps = []
 
   if (is_android) {
+    public_deps += [
+      ":AppRTCMobile",
+      ":AppRTCMobileTest",
+    ]
+  }
+
+  if (is_ios || (is_mac && target_cpu != "x86")) {
     public_deps += [ ":AppRTCMobile" ]
   }
-  if (is_linux) {
+
+  if (is_linux || is_win) {
     public_deps += [
       ":peerconnection_client",
       ":peerconnection_server",
       ":relayserver",
       ":stunserver",
       ":turnserver",
     ]
   }
 }
 
@@ skipping 481 matching lines @@
       "//webrtc/pc:rtc_pc",
       "//webrtc/system_wrappers:field_trial_default",
       "//webrtc/system_wrappers:metrics_default",
     ]
     if (!build_with_chromium && is_clang) {
       # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
   }
 }