Revert of Replace all occurrences of RELEASE_ASSERT in wtf with CHECK.

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; }
 
-#if defined(OFFICIAL_BUILD) && defined(NDEBUG)
     NO_RETURN_DUE_TO_CRASH void writeTo(LChar*)
-#else
-    void writeTo(LChar*)
-#endif
     {
-        CHECK(false);
+        RELEASE_ASSERT(false);
     }
 
     void writeTo(UChar* destination);
 
 private:
     const UChar* m_buffer;
     unsigned m_length;
 };
 
 template<>
@@ skipping 161 matching lines @@
     result += adapter1.length();
     adapter2.writeTo(result);
 
     return resultImpl.release();
 }
 
 } // namespace WTF
 
 #include "wtf/text/StringOperators.h"
 #endif