Revert of Revert of Make SharedMemoryHandle a class on Mac.

base/base.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.
 
 {
   'includes': [
     'trace_event/trace_event.gypi',
   ],
   'target_defaults': {
     'variables': {
@@ skipping 340 matching lines @@
           'memory/ref_counted.cc',
           'memory/ref_counted.h',
           'memory/ref_counted_delete_on_message_loop.h',
           'memory/ref_counted_memory.cc',
           'memory/ref_counted_memory.h',
           'memory/scoped_policy.h',
           'memory/scoped_ptr.h',
           'memory/scoped_vector.h',
           'memory/shared_memory.h',
           'memory/shared_memory_android.cc',
+          'memory/shared_memory_handle.h',
+          'memory/shared_memory_handle_mac.cc',
+          'memory/shared_memory_mac.cc',
           'memory/shared_memory_nacl.cc',
           'memory/shared_memory_posix.cc',
           'memory/shared_memory_win.cc',
           'memory/singleton.cc',
           'memory/singleton.h',
           'memory/weak_ptr.cc',
           'memory/weak_ptr.h',
           'message_loop/incoming_task_queue.cc',
           'message_loop/incoming_task_queue.h',
           'message_loop/message_loop.cc',
@@ skipping 382 matching lines @@
         'defines': [
           'BASE_IMPLEMENTATION',
         ],
         'include_dirs': [
           '..',
         ],
         'msvs_disabled_warnings': [
           4018,
         ],
         'target_conditions': [
+          ['OS == "mac"', {
+            'sources!': [
+              'memory/shared_memory_posix.cc',
+            ],
+          }],
           ['(<(desktop_linux) == 0 and <(chromeos) == 0) or >(nacl_untrusted_build)==1', {
               'sources/': [
                 ['exclude', '^nix/'],
               ],
               'sources!': [
                 'atomicops_internals_x86_gcc.cc',
               ],
           }],
           ['<(use_glib)==0 or >(nacl_untrusted_build)==1', {
               'sources!': [
@@ skipping 254 matching lines @@
           'i18n/time_formatting.h',
           'i18n/timezone.cc',
           'i18n/timezone.h',
           'i18n/utf8_validator_tables.cc',
           'i18n/utf8_validator_tables.h',
         ],
       }]
     ],
   },
 }