replace COMPILE_ASSERT with static_assert in core/editing/

Source/core/editing/HTMLInterchange.cpp

 /*
  * Copyright (C) 2004, 2008 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 24 matching lines @@
 
 namespace blink {
 
 String convertHTMLTextToInterchangeFormat(const String& in, const Text& node)
 {
     // Assume all the text comes from node.
     if (node.renderer() && node.renderer()->style()->preserveNewline())
         return in;
 
     const char convertedSpaceString[] = "<span class=\"" AppleConvertedSpace "\">\xA0</span>";
-    COMPILE_ASSERT((static_cast<unsigned char>('\xA0') == noBreakSpace), ConvertedSpaceStringSpaceIsNoBreakSpace);
+    static_assert((static_cast<unsigned char>('\xA0') == noBreakSpace), "\\xA0 should be non-breaking space");
 
     StringBuilder s;
 
     unsigned i = 0;
     unsigned consumed = 0;
     while (i < in.length()) {
         consumed = 1;
         if (isCollapsibleWhitespace(in[i])) {
             // count number of adjoining spaces
             unsigned j = i + 1;
@@ skipping 35 matching lines @@
             }
         } else
             s.append(in[i]);
         i += consumed;
     }
 
     return s.toString();
 }
 
 } // namespace blink