Add ScopedObjCClassSwizzler in base/mac, absorbs objc_method_swizzle and ScopedClassSwizzler

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.
 
 {
   'target_defaults': {
     'variables': {
       'base_target': 0,
       'base_i18n_target': 0,
     },
@@ skipping 286 matching lines @@
           'mac/scoped_launch_data.h',
           'mac/scoped_mach_port.cc',
           'mac/scoped_mach_port.h',
           'mac/scoped_mach_vm.cc',
           'mac/scoped_mach_vm.h',
           'mac/scoped_nsautorelease_pool.h',
           'mac/scoped_nsautorelease_pool.mm',
           'mac/scoped_nsexception_enabler.h',
           'mac/scoped_nsexception_enabler.mm',
           'mac/scoped_nsobject.h',
+          'mac/scoped_objc_class_swizzler.h',
+          'mac/scoped_objc_class_swizzler.mm',
           'mac/scoped_sending_event.h',
           'mac/scoped_sending_event.mm',
           'mac/scoped_typeref.h',
           'mac/sdk_forward_declarations.h',
           'mac/sdk_forward_declarations.mm',
           'macros.h',
           'md5.cc',
           'md5.h',
           'memory/aligned_memory.cc',
           'memory/aligned_memory.h',
@@ skipping 674 matching lines @@
           'i18n/time_formatting.h',
           'i18n/timezone.cc',
           'i18n/timezone.h',
           'i18n/utf8_validator_tables.cc',
           'i18n/utf8_validator_tables.h',
         ],
       }]
     ],
   },
 }