Synced Scons with GYP build. ;-)

SConstruct

 # 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 41 matching lines @@
 GCC_EXTRA_CCFLAGS = []
 GCC_DTOA_EXTRA_CCFLAGS = []
 
 LIBRARY_FLAGS = {
   'all': {
     'CPPPATH': [src_dir],
     'regexp:interpreted': {
       'CPPDEFINES': ['V8_INTERPRETED_REGEXP']
     },
     'mode:debug': {
-      'CPPDEFINES': ['V8_ENABLE_CHECKS', 'OBJECT_PRINT']
+      'CPPDEFINES': ['V8_ENABLE_CHECKS', 'OBJECT_PRINT', 'VERIFY_HEAP']
     },
     'objectprint:on': {
       'CPPDEFINES':   ['OBJECT_PRINT'],
     },
     'debuggersupport:on': {
       'CPPDEFINES':   ['ENABLE_DEBUGGER_SUPPORT'],
     },
     'inspector:on': {
       'CPPDEFINES':   ['INSPECTOR'],
     },
@@ skipping 1535 matching lines @@
 #  will not work much longer. Please switch to using  #
 #  the GYP-based build now. Instructions are at       #
 #  http://code.google.com/p/v8/wiki/BuildingWithGYP.  #
 #######################################################
   """
 
 WarnAboutDeprecation()
 import atexit
 atexit.register(WarnAboutDeprecation)
 Build()