Remove usage of to-be-deprecated APIs from v8 core

tools/gyp/v8.gyp

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 346 matching lines @@
       'type': 'static_library',
       'dependencies': [
         'v8_libbase',
       ],
       'variables': {
         'optimize': 'max',
       },
       'include_dirs+': [
         '../..',
       ],
+      'defines': [
+        # TODO(jochen): Remove again after this is globally turned on.
+        'V8_IMMINENT_DEPRECATION_WARNINGS',
+      ],
       'sources': [  ### gcmole(all) ###
         '../../src/accessors.cc',
         '../../src/accessors.h',
         '../../src/allocation.cc',
         '../../src/allocation.h',
         '../../src/allocation-site-scopes.cc',
         '../../src/allocation-site-scopes.h',
         '../../src/allocation-tracker.cc',
         '../../src/allocation-tracker.h',
         '../../src/api.cc',
@@ skipping 1503 matching lines @@
         }],
         ['want_separate_host_toolset==1', {
           'toolsets': ['host'],
         }, {
           'toolsets': ['target'],
         }],
       ],
     },
   ],
 }