First stab at Mac breakpad support.

chrome/chrome.gyp

 # 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': {
     'chromium_code': 1,
   },
   'includes': [
     '../build/common.gypi',
@@ skipping 1450 matching lines @@
       'type': 'executable',
       'mac_bundle': 1,
       'dependencies': [
         'common',
         'browser',
         'renderer',
         '../printing/printing.gyp:printing',
       ],
       'sources': [
         # All .cc, .h, .m, and .mm files under app except for tests.
-        'app/breakpad.cc',
-        'app/breakpad.h',
+        'app/breakpad_win.cc',
+        'app/breakpad_win.h',
+        'app/breakpad_mac.mm',
+        'app/breakpad_mac.h',
         'app/chrome_dll_main.cc',
         'app/chrome_dll_resource.h',
         'app/chrome_exe_main.cc',
         'app/chrome_exe_main.mm',
         'app/chrome_exe_main_gtk.cc',
         'app/chrome_exe_resource.h',
         'app/client_util.cc',
         'app/client_util.h',
         'app/google_update_client.cc',
         'app/google_update_client.h',
@@ skipping 176 matching lines @@
                   'outputs': [
                     '<(INTERMEDIATE_DIR)/repack/en-US.pak',
                   ],
                 }],
               ],
               'action': ['python', '<(repack_path)', '<@(_outputs)', '<@(pak_inputs)'],
               'process_outputs_as_mac_bundle_resources': 1,
             },
           ],
           'sources!': [
-            'app/breakpad.cc',
             'app/chrome_exe_main.cc',
             'app/client_util.cc',
             'app/google_update_client.cc',
           ]
         }],
       ],
     },
     {
       'target_name': 'image_diff',
       'type': 'executable',
@@ skipping 1059 matching lines @@
             'Debug': {
               'msvs_precompiled_header': 'tools/build/win/precompiled.h',
               'msvs_precompiled_source': 'tools/build/win/precompiled.cc',
             },
           },
         },
       ]},  # 'targets'
     ],  # OS=="win"
   ],  # 'conditions'
 }