Print additional message for RELEASE_ASSERT in builds used for fuzzing.

third_party/WebKit/Source/wtf/text/StringConcatenate.h

 /*
  * Copyright (C) 2010 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 153 matching lines @@
 template<>
 class WTF_EXPORT StringTypeAdapter<const UChar*> {
     DISALLOW_NEW();
 public:
     StringTypeAdapter(const UChar* buffer);
 
     unsigned length() { return m_length; }
 
     bool is8Bit() { return false; }
 
-    NO_RETURN_DUE_TO_CRASH void writeTo(LChar*)
+    void writeTo(LChar*)

[mmoroz, 2016/08/25 10:45:53]

Another approach could be:

    NO_RETURN_DUE_TO_CRASH void writeTo(LChar*)
    {
        RELEASE_ASSERT(false);
        CRASH();
    }


Otherwise, the compiler doesn't believe that this function is 'noreturn' and
gives a warning (i.e. error):

../../third_party/WebKit/Source/wtf/text/StringConcatenate.h:177:5: error:
function declared 'noreturn' should not return [-Werror,-Winvalid-noreturn]
    }
    ^
1 error generated.

[tkent, 2016/08/25 12:54:06]

IMO, it's ok to remove NO_RETURN_DE_TO_CRASH here.
NO_RETURN_DE_TO_CRASH doesn't have much benefit, and I'd like to remove
NO_RETURN_DE_TO_CRASH itself.

     {
         RELEASE_ASSERT(false);
     }
 
     void writeTo(UChar* destination);
 
 private:
     const UChar* m_buffer;
     unsigned m_length;
 };
@@ skipping 163 matching lines @@
     result += adapter1.length();
     adapter2.writeTo(result);
 
     return resultImpl.release();
 }
 
 } // namespace WTF
 
 #include "wtf/text/StringOperators.h"
 #endif