Add ScopedObjCClassSwizzler in base/mac, absorbs objc_method_swizzle and ScopedClassSwizzler

base/BUILD.gn

 # Copyright (c) 2013 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.
 
 import("//build/config/ui.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
@@ skipping 273 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/sdk_forward_declarations.h",
     "macros.h",
     "md5.cc",
     "md5.h",
     "memory/aligned_memory.cc",
     "memory/aligned_memory.h",
     "memory/discardable_memory.cc",
     "memory/discardable_memory.h",
@@ skipping 1114 matching lines @@
       "android/java/templates/NativeLibraries.template",
     ]
     inputs = [
       "android/java/templates/native_libraries_array.h",
     ]
 
     package_name = "org/chromium/base/library_loader"
     include_path = "android/java/templates"
   }
 }