Revert 99673 (didn't help) - mac: Use stabs instead of dwarf when fastbuild=1

build/common.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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 839 matching lines @@
             },
           }],
           # Clang creates chubby debug information, which makes linking very
           # slow. For now, don't create debug information with clang.  See
           # http://crbug.com/70000
           ['OS=="linux" and clang==1', {
             'variables': {
               'debug_extra_cflags': '-g0',
             },
           }],
-          ['OS=="mac"', {
-            'xcode_settings': {
-              # Goma needs to ship all symbol information over the wire.
-              # <(debug_extra_cflags) will still generate -g1 STABS information,
-              # which is smaller than -gdwarf-2 information.
-              'GCC_GENERATE_DEBUGGING_SYMBOLS': 'NO',
-            },
-          }],
         ],  # conditions for fastbuild.
       }],  # fastbuild!=0
       ['selinux==1', {
         'defines': ['CHROMIUM_SELINUX=1'],
       }],
       ['win_use_allocator_shim==0', {
         'conditions': [
           ['OS=="win"', {
             'defines': ['NO_TCMALLOC'],
           }],
@@ skipping 1152 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }