GN: Exclude some packages that are not used on CrOS

build/config/linux/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/linux/pkg_config.gni")
 import("//build/config/features.gni")
 import("//build/config/sysroot.gni")
 import("//build/config/ui.gni")
 import("//tools/generate_library_loader/generate_library_loader.gni")
 
@@ skipping 15 matching lines @@
 }
 
 pkg_config("freetype2") {
   packages = [ "freetype2" ]
 }
 
 pkg_config("glib") {
   packages = [ "glib-2.0", "gmodule-2.0", "gobject-2.0", "gthread-2.0" ]
 }
 
-pkg_config("gtk") {
-  # Gtk requires gmodule, but it does not list it as a dependency in some
-  # misconfigured systems.
-  packages = [ "gmodule-2.0", "gtk+-2.0", "gthread-2.0" ]
-}
-
-pkg_config("gtkprint") {
-  packages = [ "gtk+-unix-print-2.0" ]
-}
-
 pkg_config("pangocairo") {
   packages = [ "pangocairo" ]
 }
 
 pkg_config("pangoft2") {
   packages = [ "pangoft2" ]
 }
 
 pkg_config("udev") {
   packages = [ "libudev" ]
 }
 
 # Note: if your target also depends on //dbus, you don't need to add this
 # config (it will get added automatically if you depend on //dbus).
 pkg_config("dbus") {
   packages = [ "dbus-1" ]
 }
 
-pkg_config("gnome_keyring") {
-  packages = [ "gnome-keyring-1" ]
-}
-
 if (use_evdev_gestures) {
   pkg_config("libevdev-cros") {
     packages = [ "libevdev-cros" ]
   }
 
   pkg_config("libgestures") {
     packages = [ "libgestures" ]
   }
 }
 
@@ skipping 39 matching lines @@
 }
 
 config("xi") {
   libs = [ "Xi" ]
 }
 
 config("libresolv") {
   libs = [ "resolv" ]
 }
 
-pkg_config("gconf") {
-  packages = [ "gconf-2.0" ]
-  defines = [ "USE_GCONF" ]
+# CrOS doesn't install GTK, gconf or any gnome packages.
+if (!is_chromeos) {
+  pkg_config("gtk") {
+    # Gtk requires gmodule, but it does not list it as a dependency in some
+    # misconfigured systems.
+    packages = [ "gmodule-2.0", "gtk+-2.0", "gthread-2.0" ]
+  }
+
+  pkg_config("gtkprint") {
+    packages = [ "gtk+-unix-print-2.0" ]
+  }
+
+  pkg_config("gnome_keyring") {
+    packages = [ "gnome-keyring-1" ]
+  }
+
+  pkg_config("gconf") {
+    packages = [ "gconf-2.0" ]
+    defines = [ "USE_GCONF" ]
+  }
 }
 
 # If brlapi isn't needed, don't require it to be installed.
 if (use_brlapi) {
   config("brlapi_config") {
     defines = [ "USE_BRLAPI" ]
   }
 
   # TODO(GYP) linux_link_brlapi support. Is this needed?
   generate_library_loader("libbrlapi") {
@@ skipping 62 matching lines @@
     "pci_alloc",
     "pci_init",
     "pci_cleanup",
     "pci_scan_bus",
     "pci_fill_info",
     "pci_lookup_name",
   ]
 }
 
 # Looking for libspeechd? Use //third_party/speech-dispatcher