ui/base and some other GN build

build/config/BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/allocator.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 
 declare_args() {
   # When set, turns off the (normally-on) iterator debugging and related stuff
   # that is normally turned on for Debug builds. These are generally useful for
   # catching bugs but in some cases may cause conflicts or excessive slowness.
   disable_iterator_debugging = false
 }
 
 # TODO(brettw) Most of these should be removed. Instead of global feature
 # flags, we should have more modular flags that apply only to a target and its
 # dependents. For example, depending on the "x11" meta-target should define
 # USE_X11 for all dependents so that everything that could use X11 gets the
 # define, but anything that doesn't depend on X11 doesn't see it.
 #
 # For now we define these globally to match the current GYP build.
 config("feature_flags") {
   # TODO(brettw) most of these need to be parameterized.
   defines = [
       "CHROMIUM_BUILD",
       "ENABLE_ONE_CLICK_SIGNIN",
       "ENABLE_REMOTING=1",
-      "ENABLE_WEBRTC=1",
       "ENABLE_CONFIGURATION_POLICY",
       "ENABLE_NOTIFICATIONS",
       "ENABLE_EGLIMAGE=1",
       "ENABLE_TASK_MANAGER=1",
       "ENABLE_EXTENSIONS=1",
       "ENABLE_PLUGIN_INSTALLATION=1",
       "ENABLE_SESSION_SERVICE=1",
       "ENABLE_THEMES=1",
       "ENABLE_AUTOFILL_DIALOG=1",
       "ENABLE_BACKGROUND=1",
@@ skipping 76 matching lines @@
   }
   if (use_x11) {
     defines += [ "USE_X11=1" ]
     if (use_xi2_mt > 0) {
       defines += [ "USE_XI2_MT=$use_xi2_mt" ]
     }
   }
   if (use_allocator != "tcmalloc") {
     defines += [ "NO_TCMALLOC" ]
   }
+  if (enable_webrtc) {
+    defines += [ "ENABLE_WEBRTC=1" ]
+  }
 }
 
 # Debug/release ----------------------------------------------------------------
 
 config("debug") {
   defines = [
     "_DEBUG",
     "DYNAMIC_ANNOTATIONS_ENABLED=1",
     "WTF_USE_DYNAMIC_ANNOTATIONS=1",
   ]
@@ skipping 83 matching lines @@
       "CoreText.framework",
       "Foundation.framework",
       "UIKit.framework",
     ]
   } else if (is_linux) {
     libs = [
       "dl",
     ]
   }
 }