First pass at content shell for the Mac. Doesn't work yet.

chrome/chrome.gyp

 # 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.
 {
   'variables': {
     'chromium_code': 1,
 
     'variables': {
       'version_py_path': 'tools/build/version.py',
       'version_path': 'VERSION',
@@ skipping 56 matching lines @@
             'platform_locale_settings_grd':
                 'app/resources/locale_settings_linux.grd',
           }],
         ],
       },],
       ['os_posix == 1 and OS != "mac" and OS != "linux"', {
         'platform_locale_settings_grd':
             'app/resources/locale_settings_linux.grd',
       },],
       ['OS=="mac"', {
-        'tweak_info_plist_path': 'tools/build/mac/tweak_info_plist',
+        'tweak_info_plist_path': '../build/mac/tweak_info_plist.py',
         'nacl_defines': [
           'NACL_WINDOWS=0',
           'NACL_LINUX=0',
           'NACL_OSX=1',
         ],
         'platform_locale_settings_grd':
             'app/resources/locale_settings_mac.grd',
         'conditions': [
           ['branding=="Chrome"', {
             'mac_bundle_id': 'com.google.Chrome',
@@ skipping 701 matching lines @@
                          '-k0',
                          '-s0',
                          '<(branding)',
                          '<(mac_bundle_id)'],
             },
             {
               # Make sure there isn't any Objective-C in the helper app's
               # executable.
               'postbuild_name': 'Verify No Objective-C',
               'action': [
-                'tools/build/mac/verify_no_objc.sh',
+                '../build/mac/verify_no_objc.sh',
               ],
             },
           ],
           'conditions': [
             ['mac_breakpad==1', {
               'variables': {
                 # A real .dSYM is needed for dump_syms to operate on.
                 'mac_real_dsym': 1,
               },
               'xcode_settings': {
@@ skipping 519 matching lines @@
           'sources': [
             'browser/safe_browsing/signature_util.h',
             'browser/safe_browsing/signature_util_win.cc',
             'tools/safe_browsing/sb_sigutil.cc',
           ],
         },
       ]},  # 'targets'
     ],  # OS=="win"
   ],  # 'conditions'
 }