GN: Add -Wl,-z defs on linux and fix errors

ui/wm/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/ui.gni")
+
 component("wm") {
   sources = [
     "core/accelerator_delegate.h",
     "core/accelerator_filter.cc",
     "core/accelerator_filter.h",
     "core/base_focus_rules.cc",
     "core/base_focus_rules.h",
     "core/capture_controller.cc",
     "core/capture_controller.h",
     "core/compound_event_filter.cc",
@@ skipping 64 matching lines @@
     "//ui/compositor",
     "//ui/events",
     "//ui/events/devices",
     "//ui/events/platform",
     "//ui/events:events_base",
     "//ui/events/platform",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/resources",
   ]
+
+  if (use_x11) {
+    configs += [ "//build/config/linux:x11" ]
+  }
 }
 
 static_library("test_support") {
   testonly = true
   sources = [
     "test/wm_test_helper.cc",
     "test/wm_test_helper.h",
   ]
 
   deps = [
@@ skipping 34 matching lines @@
     "//ui/aura:test_support",
     "//ui/base:test_support",
     "//ui/compositor:test_support",
     "//ui/events:test_support",
     "//ui/events/platform",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gl",
   ]
 }