Add filter fo chromeos dirs in filename_rules.gypi

build/filename_rules.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.
 
 # This gypi file defines the patterns used for determining whether a
 # file is excluded from the build on a given platform.  It is
 # included by common.gypi for chromium_code.
 
 {
   'target_conditions': [
@@ skipping 30 matching lines @@
         ['exclude', '(^|/)android/'],
       ],
     }],
     ['OS=="win" and >(nacl_untrusted_build)==0', {
       'sources/': [
         ['exclude', '_posix(_unittest)?\\.(h|cc)$'],
         ['exclude', '(^|/)posix/'],
       ],
     }],
     ['<(chromeos)!=1 or >(nacl_untrusted_build)==1', {
-      'sources/': [ ['exclude', '_chromeos(_unittest)?\\.(h|cc)$'] ]
+      'sources/': [
+        ['exclude', '_chromeos(_unittest)?\\.(h|cc)$'],
+        ['exclude', '(^|/)chromeos/'],
+      ],
     }],
     ['>(nacl_untrusted_build)==0', {
       'sources/': [
         ['exclude', '_nacl(_unittest)?\\.(h|cc)$'],
       ],
     }],
     ['OS!="linux" and OS!="openbsd" and OS!="freebsd" or >(nacl_untrusted_build)==1', {
       'sources/': [
         ['exclude', '_xdg(_unittest)?\\.(h|cc)$'],
       ],
@@ skipping 26 matching lines @@
     ['<(use_aura)==0 or OS!="win" or >(nacl_untrusted_build)==1', {
       'sources/': [ ['exclude', '_aurawin\\.(h|cc)$'] ]
     }],
     ['<(use_ash)==0 or >(nacl_untrusted_build)==1', {
       'sources/': [ ['exclude', '_ash(_browsertest|_unittest)?\\.(h|cc)$'],
                     ['exclude', '(^|/)ash/'],
       ]
     }],
   ]
 }