String::contains should use StringView.

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

 /*
  * Copyright (C) 2006, 2007, 2011 Apple Inc. All rights reserved.
  * 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.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 275 matching lines @@
     }
     buffer[j] = 0;
     return atomicCanonicalTextEncodingName(buffer);
 }
 
 const char* atomicCanonicalTextEncodingName(const String& alias)
 {
     if (!alias.length())
         return 0;
 
-    if (alias.contains(static_cast<UChar>('\0')))
+    if (alias.contains('\0'))
         return 0;
 
     if (alias.is8Bit())
         return atomicCanonicalTextEncodingName<LChar>(alias.characters8(), alias.length());
 
     return atomicCanonicalTextEncodingName<UChar>(alias.characters16(), alias.length());
 }
 
 bool noExtendedTextEncodingNameUsed()
 {
     return !atomicDidExtendTextCodecMaps();
 }
 
 #ifndef NDEBUG
 void dumpTextEncodingNameMap()
 {
     unsigned size = textEncodingNameMap->size();
     fprintf(stderr, "Dumping %u entries in WTF::TextEncodingNameMap...\n", size);
 
     MutexLocker lock(encodingRegistryMutex());
 
     TextEncodingNameMap::const_iterator it = textEncodingNameMap->begin();
     TextEncodingNameMap::const_iterator end = textEncodingNameMap->end();
     for (; it != end; ++it)
         fprintf(stderr, "'%s' => '%s'\n", it->key, it->value);
 }
 #endif
 
 } // namespace WTF