Introduce ASSERT_ENABLED macro.

Source/wtf/Assertions.h

 /*
  * Copyright (C) 2003, 2006, 2007 Apple Inc.  All rights reserved.
  * Copyright (C) 2013 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 39 matching lines @@
 #define ASSERTIONS_DISABLED_DEFAULT 0
 #endif
 
 #ifndef BACKTRACE_DISABLED
 #define BACKTRACE_DISABLED ASSERTIONS_DISABLED_DEFAULT
 #endif
 
 #ifndef ASSERT_DISABLED
 #define ASSERT_DISABLED ASSERTIONS_DISABLED_DEFAULT
 #endif
+#define ASSERT_ENABLED !ASSERT_DISABLED
 
 #ifndef ASSERT_MSG_DISABLED
 #define ASSERT_MSG_DISABLED ASSERTIONS_DISABLED_DEFAULT
 #endif
 
 #ifndef ASSERT_ARG_DISABLED
 #define ASSERT_ARG_DISABLED ASSERTIONS_DISABLED_DEFAULT
 #endif
 
 #ifndef FATAL_DISABLED
@@ skipping 160 matching lines @@
 
 #define RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(assertion) ASSERT_WITH_SECURITY_IMPLICATION(assertion)
 
 #else
 
 #define ASSERT_WITH_SECURITY_IMPLICATION(assertion) ASSERT(assertion)
 #define RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(assertion) RELEASE_ASSERT(assertion)
 
 #endif
 
-#if defined(ADDRESS_SANITIZER) || !ASSERT_DISABLED
+#if defined(ADDRESS_SANITIZER) || ASSERT_ENABLED
 #define SECURITY_ASSERT_ENABLED 1
 #else
 #define SECURITY_ASSERT_ENABLED 0
 #endif
 
 /* ASSERT_WITH_MESSAGE */
 
 #if ASSERT_MSG_DISABLED
 #define ASSERT_WITH_MESSAGE(assertion, ...) ((void)0)
 #else
@@ skipping 130 matching lines @@
 } \
 inline const thisType& to##thisType(const argumentType& argumentName) \
 { \
     ASSERT_WITH_SECURITY_IMPLICATION(referencePredicate); \
     return static_cast<const thisType&>(argumentName); \
 } \
 void to##thisType(const thisType*); \
 void to##thisType(const thisType&)
 
 #endif /* WTF_Assertions_h */