GN: Get os="chromeos" use_ozone=true to compile

chrome/browser/extensions/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/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 
 assert(enable_extensions)
 
@@ skipping 206 matching lines @@
       "display_info_provider_aura.h",
     ]
   }
 
   if (enable_app_list) {
     sources += rebase_path(
         gypi_values.chrome_browser_extensions_app_list_sources,
         ".", "//chrome")
   }
 
+  if (is_chromeos && use_ozone) {
+    sources -= [
+      "global_shortcut_listener_chromeos.cc",
+    ]
+  }
   if (!use_ozone) {
     sources -= [
       "global_shortcut_listener_ozone.cc",
     ]
   }
 }