Give plug-in processes an executable heap and disable PIE/ASLR for Native

chrome/chrome_exe.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.
 
 {
   'target_defaults': {
     'variables': {
       'chrome_exe_target': 0,
     },
     'target_conditions': [
@@ skipping 255 matching lines @@
             #   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)',
           },
           'dependencies': [
             'helper_app',
             'infoplist_strings_tool',
+            'interpose_dependency_shim',
             'chrome_manifest_bundle',
           ],
           'mac_bundle_resources': [
             '<(PRODUCT_DIR)/<(mac_bundle_id).manifest',
           ],
           'actions': [
             {
               # Generate the InfoPlist.strings file
               'action_name': 'Generate InfoPlist.strings files',
               'variables': {
@@ skipping 34 matching lines @@
               ],
               'message': 'Generating the language InfoPlist.strings files',
               'process_outputs_as_mac_bundle_resources': 1,
             },
           ],
           'copies': [
             {
               'destination': '<(PRODUCT_DIR)/<(mac_product_name).app/Contents/Versions/<(version_full)',
               'files': [
                 '<(PRODUCT_DIR)/<(mac_product_name) Helper.app',
+                '<(PRODUCT_DIR)/libplugin_carbon_interpose.dylib',
               ],
             },
           ],
           'postbuilds': [
             {
               'postbuild_name': 'Copy <(mac_product_name) Framework.framework',
               'action': [
                 'tools/build/mac/copy_framework_unversioned',
                 '${BUILT_PRODUCTS_DIR}/<(mac_product_name) Framework.framework',
                 '${BUILT_PRODUCTS_DIR}/${CONTENTS_FOLDER_PATH}/Versions/<(version_full)',
@@ skipping 19 matching lines @@
                          '<(branding)',
                          '<(mac_bundle_id)'],
             },
             {
               'postbuild_name': 'Clean up old versions',
               'action': [
                 'tools/build/mac/clean_up_old_versions',
                 '<(version_full)'
               ],
             },
+            {
+              # This postbuid step is responsible for creating the following
+              # helpers:
+              #
+              # For unofficial Chromium branding, Chromium Helper EH.app and
+              # Chromium Helper NP.app are created from Chromium Helper.app.
+              # For official Google Chrome branding, Google Chrome Helper
+              # EH.app and Google Chrome Helper NP.app are created from
+              # Google Chrome Helper.app.
+              #
+              # The EH helper is marked for an executable heap. The NP helper
+              # is marked for no PIE (ASLR).
+              #
+              # Normally, applications shipping as part of offical builds with
+              # Google Chrome branding have dsymutil (dwarf-with-dsym,
+              # mac_real_dsym) and dump_syms (mac_breakpad) run on them to
+              # produce a .dSYM bundle and a Breakpad .sym file. This is
+              # unnecessary for the "More Helpers" because they're identical
+              # to the original helper except for the bits in their Mach-O
+              # headers that change to enable or disable special features.
+              # Each .dSYM and Breakpad symbol file is identified by UUID
+              # stored in a Mach-O file's LC_UUID load command. Because the
+              # "More Helpers" share a UUID with the original helper, there's
+              # no need to run dsymutil or dump_syms again. All helpers can
+              # share the same .dSYM and Breakpad symbol file.
+              'postbuild_name': 'Make More Helpers',
+              'action': [
+                'tools/build/mac/make_more_helpers.sh',
+                '<(version_full)',
+                '<(mac_product_name)',
+              ],
+            },
           ],  # postbuilds
         }],
         ['OS=="linux"', {
           'conditions': [
             ['branding=="Chrome"', {
               'dependencies': [
                 'linux_installer_configs',
               ],
             }],
             ['selinux==0', {
@@ skipping 118 matching lines @@
           'configurations': {
             'Common_Base': {
               'msvs_target_platform': 'x64',
             },
           },
         },
       ],
     }],
   ],
 }