Try 2: Completely redo how themes are stored on disk and processed at install time.

base/base.gyp

 # Copyright (c) 2009 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': {
     'chromium_code': 1,
   },
   'includes': [
     'base.gypi',
@@ skipping 167 matching lines @@
             'message_pump_glib_unittest.cc',
           ]
         }],
         # This is needed to trigger the dll copy step on windows.
         # TODO(mark): This should not be necessary.
         ['OS == "win"', {
           'dependencies': [
             '../third_party/icu/icu.gyp:icudata',
           ],
           'sources!': [
-            'data_pack_unittest.cc',
             'file_descriptor_shuffle_unittest.cc',
           ],
         }, {  # OS != "win"
           'sources!': [
             'event_trace_consumer_win_unittest.cc',
             'event_trace_controller_win_unittest.cc',
             'event_trace_provider_win_unittest.cc',
             'object_watcher_unittest.cc',
             'pe_image_unittest.cc',
             'scoped_bstr_win_unittest.cc',
@@ skipping 127 matching lines @@
       ],
     }],
   ],
 }
 
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 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: