Hide X11 dependencies when use_x11=0.

media/cast/cast.gyp

 # Copyright 2013 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.
 
 {
   'variables': {
     'include_tests%': 1,
     'chromium_code': 1,
   },
   'targets': [
@@ skipping 166 matching lines @@
             '<(DEPTH)/media/media.gyp:media',
             '<(DEPTH)/testing/gtest.gyp:gtest',
             '<(DEPTH)/media/cast/transport/cast_transport.gyp:cast_transport',
             '<(DEPTH)/media/cast/test/utility/utility.gyp:cast_test_utility',
             '<(DEPTH)/third_party/libyuv/libyuv.gyp:libyuv',
           ],
           'sources': [
             '<(DEPTH)/media/cast/test/receiver.cc',
           ],
           'conditions': [
-            ['OS == "linux"', {
+            ['OS == "linux" and use_x11==1', {
               'dependencies': [
                 '<(DEPTH)/build/linux/system.gyp:x11',
                 '<(DEPTH)/build/linux/system.gyp:xext',
               ],
               'sources': [
                 '<(DEPTH)/media/cast/test/linux_output_window.cc',
                 '<(DEPTH)/media/cast/test/linux_output_window.h',
               ],
           }],
           ],
         },
       ],  # targets
     }], # include_tests
   ],
 }