Print backtraces on FATAL log messages in debug mode.

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': [
     '../build/common.gypi',
@@ skipping 531 matching lines @@
         'gfx/jpeg_codec_unittest.cc',
         'gfx/native_theme_unittest.cc',
         'gfx/png_codec_unittest.cc',
         'gfx/rect_unittest.cc',
         'at_exit_unittest.cc',
         'atomicops_unittest.cc',
         'clipboard_unittest.cc',
         'command_line_unittest.cc',
         'condition_variable_unittest.cc',
         'data_pack_unittest.cc',
+        'debug_util_unittest.cc',
         'directory_watcher_unittest.cc',
         'field_trial_unittest.cc',
         'file_path_unittest.cc',
         'file_util_unittest.cc',
         'file_version_info_unittest.cc',
         'histogram_unittest.cc',
         'hmac_unittest.cc',
         'idletimer_unittest.cc',
         'json_reader_unittest.cc',
         'json_writer_unittest.cc',
@@ skipping 143 matching lines @@
           'target_name': 'debug_message',
           'type': 'executable',
           'sources': [
             'debug_message.cc',
           ],
         },
       ],
     }],
   ],
 }