Allow assertions to be enabled in Blink Release builds.

Source/platform/weborigin/KURL.cpp

 /*
  * Copyright (C) 2004, 2007, 2008, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Research In Motion Limited. All rights reserved.
  * Copyright (C) 2008, 2009, 2011 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.
@@ skipping 29 matching lines @@
 #include <stdio.h>
 #endif
 
 namespace WebCore {
 
 static const int maximumValidPortNumber = 0xFFFE;
 static const int invalidPortNumber = 0xFFFF;
 
 static void assertProtocolIsGood(const char* protocol)
 {
-#ifndef NDEBUG
+#if ENABLE(ASSERT)
     const char* p = protocol;
     while (*p) {
         ASSERT(*p > ' ' && *p < 0x7F && !(*p >= 'A' && *p <= 'Z'));
         ++p;
     }
 #endif
 }
 
 // Note: You must ensure that |spec| is a valid canonicalized URL before calling this function.
 static const char* asURLChar8Subtle(const String& spec)
@@ skipping 852 matching lines @@
     m_string = AtomicString::fromUTF8(output.data(), output.length());
 }
 
 bool KURL::isSafeToSendToAnotherThread() const
 {
     return m_string.isSafeToSendToAnotherThread()
         && (!m_innerURL || m_innerURL->isSafeToSendToAnotherThread());
 }
 
 } // namespace WebCore