Use gyp targets to link in X11 libraries instead of setting -lXfoo

content/content_common.gypi

 # Copyright (c) 2012 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../components/tracing.gyp:tracing',
     '../net/net.gyp:net',
     '../skia/skia.gyp:skia',
@@ skipping 480 matching lines @@
         '../build/linux/system.gyp:pangocairo',
       ],
       'sources!': [
         'common/font_list_ozone.cc',
       ],
     }],
     ['use_x11 == 1', {
       'include_dirs': [
         '<(DEPTH)/third_party/khronos',
       ],
-      'link_settings': {
-        'libraries': [
-          '-lXcomposite',
-        ],
-      },
+      'dependencies': [
+         '<(DEPTH)/build/linux/system.gyp:xcomposite',
+      ],
     }],
     ['use_x11 == 1 and (target_arch != "arm" or chromeos == 0)', {
       'sources': [
         'common/gpu/x_util.cc',
         'common/gpu/x_util.h',
       ],
     }],
     ['enable_plugins==1', {
       'dependencies': [
         '../ppapi/ppapi_internal.gyp:ppapi_shared',
@@ skipping 131 matching lines @@
         'common/sandbox_linux/bpf_renderer_policy_linux.cc',
         'common/sandbox_linux/bpf_renderer_policy_linux.h',
         'common/sandbox_linux/sandbox_bpf_base_policy_linux.cc',
         'common/sandbox_linux/sandbox_bpf_base_policy_linux.h',
       ],
     }, {
       'defines': ['USE_SECCOMP_BPF'],
     }],
   ],
 }