gn: Use a separate flag for enabling libgnome-keyring support.

chrome/browser/BUILD.gn

 # Copyright 2014 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/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
+import("//components/os_crypt/features.gni")
 import("//media/media_options.gni")
 import("//third_party/protobuf/proto_library.gni")
 
 # //build/config/android/rules.gni imports //tools/grit/grit_rule.gni, which
 # produces a conflict for the "grit" template so we have to only include one.
 if (is_android) {
   import("//build/config/android/rules.gni")
 } else {
   import("//tools/grit/grit_rule.gni")
 }
@@ skipping 541 matching lines @@
     ]
     public_deps += [
       "//components/metrics/leak_detector:interfaces",
       "//components/metrics/leak_detector:leak_detector",
     ]
   }
 
   if (use_cups) {
     configs += [ "//printing:cups" ]
   }
-  if (is_desktop_linux) {
+  if (use_gnome_keyring) {
     sources += rebase_path(gypi_values.chrome_browser_gnome_keyring_sources,
                            ".",
                            "//chrome")
     configs += [ "//components/os_crypt:gnome_keyring" ]
   }
   if (is_desktop_linux) {
     sources += rebase_path(gypi_values.chrome_browser_libsecret_sources,
                            ".",
                            "//chrome")
     defines += [ "USE_LIBSECRET" ]
@@ skipping 771 matching lines @@
   # linking all of the test support.
   static_library("pepper_cdm_test_constants") {
     testonly = true
     visibility = [ "//chrome/*" ]
     sources = [
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }