[iOS/OS X] Allow base::scoped_nsobject<> to be used when ARC is enabled.

base/base.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,
   },
   'includes': [
     '../build/win_precompile.gypi',
@@ skipping 203 matching lines @@
         ['OS == "ios" and _toolset != "host"', {
           'link_settings': {
             'libraries': [
               '$(SDKROOT)/System/Library/Frameworks/CoreFoundation.framework',
               '$(SDKROOT)/System/Library/Frameworks/CoreGraphics.framework',
               '$(SDKROOT)/System/Library/Frameworks/CoreText.framework',
               '$(SDKROOT)/System/Library/Frameworks/Foundation.framework',
               '$(SDKROOT)/System/Library/Frameworks/UIKit.framework',
             ],
           },
+          'sources/': [
+            ['include', '^mac/scoped_block\\.mm$'],
+            ['include', '^mac/scoped_nsobject\\.mm$'],
+          ],
         }],
         ['OS != "win" and (OS != "ios" or _toolset == "host")', {
             'dependencies': ['third_party/libevent/libevent.gyp:libevent'],
         },],
         ['component=="shared_library"', {
           'conditions': [
             ['OS=="win"', {
               'sources!': [
                 'debug/debug_on_start_win.cc',
               ],
@@ skipping 1490 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'base_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }