Update from https://crrev.com/317530

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 162 matching lines @@
   ]
 
   # TODO(brettw) Theoretically I think ignore_libs should be set so that we
   # don't link directly to GIO and use the loader generated below. But the gio
   # target in GYP doesn't make any sense to me and appears to link directly to
   # GIO in addition to making a loader. This this uncommented, the link in
   # component build fails, so I think this is closer to the GYP build.
   #ignore_libs = true  # Loader generated below.
 }
 
-# This generates a target named "gio".
-generate_library_loader("gio") {
-  name = "LibGioLoader"
-  output_h = "libgio.h"
-  output_cc = "libgio_loader.cc"
-  header = "<gio/gio.h>"
-  config = ":gio_config"
+if (is_desktop_linux) {
+  # This generates a target named "gio".
+  generate_library_loader("gio") {
+    name = "LibGioLoader"
+    output_h = "libgio.h"
+    output_cc = "libgio_loader.cc"
+    header = "<gio/gio.h>"
+    config = ":gio_config"
 
-  functions = gypi_values.libgio_functions
+    functions = gypi_values.libgio_functions
+  }
 }
 
 # This generates a target named "libpci".
 generate_library_loader("libpci") {
   name = "LibPciLoader"
   output_h = "libpci.h"
   output_cc = "libpci_loader.cc"
   header = "<pci/pci.h>"
 
   functions = gypi_values.libpci_functions
@@ skipping 20 matching lines @@
 
   functions = gypi_values.libudev_functions
 }
 
 group("udev") {
   deps = [
     ":udev0_loader",
     ":udev1_loader",
   ]
 }