Don't initialize ICU replacement character for UTF-32 encodings

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

 /*
  * Copyright (C) 2004, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov <ap@nypop.com>
  * Copyright (C) 2007-2009 Torch Mobile, Inc.
  *
  * 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 83 matching lines @@
   return m_name == a;
 }
 
 bool TextEncoding::isNonByteBasedEncoding() const {
   if (noExtendedTextEncodingNameUsed()) {
     return *this == UTF16LittleEndianEncoding() ||
            *this == UTF16BigEndianEncoding();
   }
 
   return *this == UTF16LittleEndianEncoding() ||
-         *this == UTF16BigEndianEncoding() ||
+         *this == UTF16BigEndianEncoding() || *this == UTF32Encoding() ||
          *this == UTF32BigEndianEncoding() ||
          *this == UTF32LittleEndianEncoding();
 }
 
 bool TextEncoding::isUTF7Encoding() const {
   if (noExtendedTextEncodingNameUsed())
     return false;
 
   return *this == UTF7Encoding();
 }
@@ skipping 34 matching lines @@
   return globalUTF16BigEndianEncoding;
 }
 
 const TextEncoding& UTF16LittleEndianEncoding() {
   DEFINE_THREAD_SAFE_STATIC_LOCAL(const TextEncoding,
                                   globalUTF16LittleEndianEncoding,
                                   new TextEncoding("UTF-16LE"));
   return globalUTF16LittleEndianEncoding;
 }
 
+// UTF-32 is UTF-32LE with an implicit BOM.
+const TextEncoding& UTF32Encoding() {
+  DEFINE_THREAD_SAFE_STATIC_LOCAL(const TextEncoding, globalUTF32Encoding,
+                                  new TextEncoding("UTF-32"));
+  return globalUTF32Encoding;
+}
+
 const TextEncoding& UTF32BigEndianEncoding() {
   DEFINE_THREAD_SAFE_STATIC_LOCAL(const TextEncoding,
                                   globalUTF32BigEndianEncoding,
                                   new TextEncoding("UTF-32BE"));
   return globalUTF32BigEndianEncoding;
 }
 
 const TextEncoding& UTF32LittleEndianEncoding() {
   DEFINE_THREAD_SAFE_STATIC_LOCAL(const TextEncoding,
                                   globalUTF32LittleEndianEncoding,
                                   new TextEncoding("UTF-32LE"));
   return globalUTF32LittleEndianEncoding;
 }
 
 const TextEncoding& UTF8Encoding() {
   DEFINE_THREAD_SAFE_STATIC_LOCAL(const TextEncoding, globalUTF8Encoding,
                                   new TextEncoding("UTF-8"));
   ASSERT(globalUTF8Encoding.isValid());
   return globalUTF8Encoding;
 }
 
 const TextEncoding& WindowsLatin1Encoding() {
   DEFINE_THREAD_SAFE_STATIC_LOCAL(const TextEncoding,
                                   globalWindowsLatin1Encoding,
                                   new TextEncoding("WinLatin1"));
   return globalWindowsLatin1Encoding;
 }
 
 }  // namespace WTF