Implemented AddAllocWithZoneMethod to override allocWithZone: on demand.

ios/web/ios_web.gyp

 # Copyright 2014 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,
    },
   'targets': [
     {
       'target_name': 'ios_web',
       'type': 'static_library',
       'include_dirs': [
         '../..',
       ],
       'dependencies': [
         'ios_web_core',
         'js_resources',
         'user_agent',
         '../../base/base.gyp:base',
         '../../content/content.gyp:content_browser',
         '../../net/net.gyp:net',
         '../../ui/base/ui_base.gyp:ui_base',
         '../../ui/gfx/gfx.gyp:gfx',
       ],
       'sources': [
+        'alloc_with_zone_interceptor.h',
+        'alloc_with_zone_interceptor.mm',
         'browser_state.cc',
         'load_committed_details.cc',
         'navigation/navigation_item_impl.h',
         'navigation/navigation_item_impl.mm',
         'navigation/nscoder_util.h',
         'navigation/nscoder_util.mm',
         'navigation/time_smoother.cc',
         'navigation/time_smoother.h',
         'net/cert_policy.cc',
         'net/certificate_policy_cache.cc',
@@ skipping 226 matching lines @@
       'dependencies': [
         '../../base/base.gyp:base'
       ],
       'sources': [
         'public/user_agent.h',
         'public/user_agent.mm',
       ],
     },
   ],
 }