Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/build/features.gypi

 #
 # Copyright (C) 2009 Google Inc. 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
@@ skipping 22 matching lines @@
   #
   # ====================================
   #
   #     Keep the GN version in Sync:
   #     Source/config.gni
   #
   # ====================================
   'variables': {
     'feature_defines': [
       'ENABLE_LAYOUT_UNIT_IN_INLINE_BOXES=0',
+      'ENABLE_OILPAN=1',
       # WTF_USE_DYNAMIC_ANNOTATIONS=1 may be defined in build/common.gypi
       # We can't define it here because it should be present only
       # in Debug or release_valgrind_build=1 builds.
     ],
     # We have to nest variables inside variables so that they can be overridden
     # through GYP_DEFINES.
     'variables': {
       # Enables the Oilpan garbage-collection infrastructure.
       # If you update the default value below, be sure to update the one in
       # ../config.gyp, too!
@@ skipping 25 matching lines @@
       ['OS=="android" and use_openmax_dl_fft!=0', {
         'feature_defines': [
           'WTF_USE_WEBAUDIO_OPENMAX_DL_FFT=1',
         ],
       }],
       ['use_default_render_theme==1', {
         'feature_defines': [
           'WTF_USE_DEFAULT_RENDER_THEME=1',
         ],
       }],
-      ['enable_oilpan==1', {
-        'feature_defines': [
-          'ENABLE_OILPAN=1',
-        ],
-      }],
       ['blink_logging_always_on==1', {
         'feature_defines': [
           'LOG_DISABLED=0',
         ],
       }],
     ],
   },
 }