Add "Unicode" suffixes to some functions of WTF::String and WTF::StringImpl.

third_party/WebKit/Source/platform/wtf/text/AtomicString.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2013 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 53 matching lines @@
   if (!*chars)
     return g_empty_atom;
   return AtomicString(AtomicStringTable::Instance().AddUTF8(chars, nullptr));
 }
 
 AtomicString AtomicString::DeprecatedLower() const {
   // Note: This is a hot function in the Dromaeo benchmark.
   StringImpl* impl = this->Impl();
   if (UNLIKELY(!impl))
     return *this;
-  RefPtr<StringImpl> new_impl = impl->Lower();
+  RefPtr<StringImpl> new_impl = impl->LowerUnicode();
   if (LIKELY(new_impl == impl))
     return *this;
   return AtomicString(new_impl.Release());
 }
 
 AtomicString AtomicString::LowerASCII() const {
   StringImpl* impl = this->Impl();
   if (UNLIKELY(!impl))
     return *this;
   RefPtr<StringImpl> new_impl = impl->LowerASCII();
@@ skipping 48 matching lines @@
   return out << s.GetString();
 }
 
 #ifndef NDEBUG
 void AtomicString::Show() const {
   string_.Show();
 }
 #endif
 
 }  // namespace WTF