Do not pass -dead_strip to ld for the Mac helper and main apps.

chrome/chrome_exe.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.
 
 {
   'targets': [
     {
       'target_name': 'chrome',
       'type': 'executable',
       'mac_bundle': 1,
@@ skipping 229 matching lines @@
             # chrome/app/app-Info.plist has:
             #   CFBundleIdentifier of CHROMIUM_BUNDLE_ID
             #   CFBundleName of CHROMIUM_SHORT_NAME
             #   CFBundleSignature of CHROMIUM_CREATOR
             # Xcode then replaces these values with the branded values we set
             # as settings on the target.
             'CHROMIUM_BUNDLE_ID': '<(mac_bundle_id)',
             'CHROMIUM_CREATOR': '<(mac_creator)',
             'CHROMIUM_SHORT_NAME': '<(branding)',
           },
+          # Turn off -dead_strip in Release mode for the main app. There's
+          # little here to strip, and doing so preserves symbols from
+          # crt1.10.6.o, which get removed incorrectly. http://crbug.com/139902
+          'configurations': {
+            'Release': {
+              'xcode_settings': {
+                'DEAD_CODE_STRIPPING': 'NO',
+              },
+            },
+          },
           'dependencies': [
             'helper_app',
             'infoplist_strings_tool',
             'interpose_dependency_shim',
             'chrome_manifest_bundle',
             # On Mac, make sure we've built chrome_dll, which contains all of
             # the library code with Chromium functionality.
             'chrome_dll',
           ],
           'mac_bundle_resources': [
@@ skipping 320 matching lines @@
               'target_name': 'chrome_nacl_win64',
               'type': 'none',
               'sources': [],
             },
           ],
         }],
       ],
     }],
   ],
 }