Remove the Document.charset setter (making it readonly)

Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 1113 matching lines @@
     return AtomicString(encoding().name());
 }
 
 String Document::defaultCharset() const
 {
     if (Settings* settings = this->settings())
         return settings->defaultTextEncodingName();
     return String();
 }
 
-void Document::setCharset(const String& charset)
-{
-    UseCounter::countDeprecation(*this, UseCounter::DocumentSetCharset);
-    if (DocumentLoader* documentLoader = loader())
-        documentLoader->setUserChosenEncoding(charset);
-    WTF::TextEncoding encoding(charset);
-    // In case the encoding didn't exist, we keep the old one (helps some sites specifying invalid encodings).
-    if (!encoding.isValid())
-        return;
-    DocumentEncodingData newEncodingData = m_encodingData;
-    newEncodingData.setEncoding(encoding);
-    setEncodingData(newEncodingData);
-}
-
 void Document::setContentLanguage(const AtomicString& language)
 {
     if (m_contentLanguage == language)
         return;
     m_contentLanguage = language;
 
     // Document's style depends on the content language.
     setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::Language));
 }
 
@@ skipping 4613 matching lines @@
 #ifndef NDEBUG
 using namespace blink;
 void showLiveDocumentInstances()
 {
     WeakDocumentSet& set = liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().string().utf8().data());
 }
 #endif