Force c++ dtors to get called in objc interfaces (it was always on since gcc4...

build/common.gypi

 # 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': {
     # .gyp files should set chromium_code to 1 if they build Chromium-specific
     # code, as opposed to external code.  This variable is used to control
     # such things as the set of warnings to enable, and whether warnings are
     # treated as errors.
@@ skipping 245 matching lines @@
     ['OS=="mac"', {
       'target_defaults': {
         'mac_bundle': 0,
         'xcode_settings': {
           'ALWAYS_SEARCH_USER_PATHS': 'NO',
           'GCC_C_LANGUAGE_STANDARD': 'c99',
           'GCC_CW_ASM_SYNTAX': 'NO',
           'GCC_DYNAMIC_NO_PIC': 'YES',
           'GCC_ENABLE_PASCAL_STRINGS': 'NO',
           'GCC_INLINES_ARE_PRIVATE_EXTERN': 'YES',
+          'GCC_OBJC_CALL_CXX_CDTORS': 'YES',
           'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES',
           'GCC_TREAT_WARNINGS_AS_ERRORS': 'YES',
           'GCC_VERSION': '4.2',
           'GCC_WARN_ABOUT_MISSING_NEWLINE': 'YES',
           'MACOSX_DEPLOYMENT_TARGET': '10.5',
           'PREBINDING': 'NO',
           'SDKROOT': 'macosx10.5',
           'USE_HEADERMAP': 'NO',
           'WARNING_CFLAGS': ['-Wall', '-Wendif-labels'],
           'conditions': [
@@ skipping 121 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',
   },
 }