x11: Include X11 dependencies only when building with X11.

content/content_browser.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': [
     'browser/speech/proto/speech_proto.gyp:speech_proto',
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../google_apis/google_apis.gyp:google_apis',
@@ skipping 1072 matching lines @@
           'defines': [
             'LINUX_SANDBOX_PATH="<(linux_sandbox_path)"',
           ],
         }],
       ],
     }],
     ['OS=="linux" and use_aura==1', {
       'dependencies': [
         '../build/linux/system.gyp:dbus',
         '../build/linux/system.gyp:fontconfig',
+        '../dbus/dbus.gyp:dbus',
+      ],
+    }],
+    ['use_x11==1', {
+      'dependencies': [
         '../build/linux/system.gyp:x11',
-        '../dbus/dbus.gyp:dbus',
       ],
     }],
     ['OS=="android"', {
       'dependencies': [
         '../media/media.gyp:media',
         'content.gyp:content_jni_headers',
       ],
       'link_settings': {
         'libraries': [
           '-ljnigraphics',
@@ skipping 127 matching lines @@
         ['exclude', '^browser/speech/'],
       ],
     }],
     ['linux_use_libgps==1', {
       'dependencies': [
         '../build/linux/system.gyp:libgps',
       ],
     }],
   ],
 }