More POSIX support for Chromium, consisting mostly of broadening ifdefs. This

chrome/chrome_tests.gypi

 # Copyright (c) 2011 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' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
@@ skipping 2956 matching lines @@
             },
           },
         }],
         ['OS=="mac"', {
           # See the comment in this section of the unit_tests target for an
           # explanation (crbug.com/43791 - libwebcore.a is too large to mmap).
           'dependencies+++': [
             '../third_party/WebKit/Source/WebCore/WebCore.gyp/WebCore.gyp:webcore',
           ],
         }],
-        ['OS=="linux"', {
+        ['toolkit_uses_gtk == 1', {
           'dependencies': [
             '../build/linux/system.gyp:gtk',
             '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
           ],
         }],
         ['os_posix == 1 and OS != "mac"', {
           'conditions': [
             ['linux_use_tcmalloc==1', {
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
@@ skipping 1081 matching lines @@
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }
 
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 # indent-tabs-mode:nil
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