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

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

 /*
  * Copyright 2014 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "wtf/text/StringConcatenate.h"
 
 // This macro is helpful for testing how many intermediate Strings are created while evaluating an
 // expression containing operator+.
@@ skipping 31 matching lines @@
     StringImpl::copyChars(destination, m_buffer, m_length);
 }
 
 WTF::StringTypeAdapter<const UChar*>::StringTypeAdapter(const UChar* buffer)
     : m_buffer(buffer)
 {
     size_t len = 0;
     while (m_buffer[len] != UChar(0))
         ++len;
 
-    CHECK_LE(len, std::numeric_limits<unsigned>::max());
+    RELEASE_ASSERT(len <= std::numeric_limits<unsigned>::max());
 
     m_length = len;
 }
 
 void WTF::StringTypeAdapter<const UChar*>::writeTo(UChar* destination)
 {
     memcpy(destination, m_buffer, m_length * sizeof(UChar));
 }
 
 WTF::StringTypeAdapter<const char*>::StringTypeAdapter(const char* buffer)
@@ skipping 77 matching lines @@
             destination[i] = data[i];
     } else {
         const UChar* data = m_buffer.characters16();
         for (unsigned i = 0; i < length; ++i)
             destination[i] = data[i];
     }
 
     WTF_STRINGTYPEADAPTER_COPIED_WTF_STRING();
 }