Remove some unused functions in core

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 790 matching lines @@
         element = registrationContext()->createCustomTagElement(*this, qName);
     else
         element = createElement(qName, false);
 
     if (!typeExtension.isEmpty())
         CustomElementRegistrationContext::setIsAttributeAndTypeExtension(element.get(), typeExtension);
 
     return element.release();
 }
 
-ScriptValue Document::registerElement(ScriptState* scriptState, const AtomicString& name, ExceptionState& exceptionState)
-{
-    ElementRegistrationOptions options;
-    return registerElement(scriptState, name, options, exceptionState);
-}
-
 ScriptValue Document::registerElement(ScriptState* scriptState, const AtomicString& name, const ElementRegistrationOptions& options, ExceptionState& exceptionState, CustomElement::NameSet validNames)
 {
     if (!registrationContext()) {
         exceptionState.throwDOMException(NotSupportedError, "No element registration context is available.");
         return ScriptValue();
     }
 
     CustomElementConstructorBuilder constructorBuilder(scriptState, options);
     registrationContext()->registerElement(this, &constructorBuilder, name, validNames, exceptionState);
     return constructorBuilder.bindingsReturnValue();
@@ skipping 3526 matching lines @@
     m_designMode = value;
     for (Frame* frame = m_frame; frame; frame = frame->tree().traverseNext(m_frame)) {
         if (!frame->isLocalFrame())
             continue;
         if (!toLocalFrame(frame)->document())
             break;
         toLocalFrame(frame)->document()->setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::DesignMode));
     }
 }
 
-Document::InheritedBool Document::getDesignMode() const
-{
-    return m_designMode;
-}
-
 bool Document::inDesignMode() const
 {
     for (const Document* d = this; d; d = d->parentDocument()) {
         if (d->m_designMode != inherit)
             return d->m_designMode;
     }
     return false;
 }
 
 String Document::designMode() const
@@ skipping 787 matching lines @@
     DocumentLoader* loader = m_frame->loader().documentLoader();
     if (!loader)
         return 0;
 
     if (m_frame->document() != this)
         return 0;
 
     return loader;
 }
 
-IntSize Document::initialViewportSize() const
-{
-    if (!view())
-        return IntSize();
-    return view()->unscaledVisibleContentSize(IncludeScrollbars);
-}
-
 Node* eventTargetNodeForDocument(Document* doc)
 {
     if (!doc)
         return 0;
     Node* node = doc->focusedElement();
     if (!node && doc->isPluginDocument()) {
         PluginDocument* pluginDocument = toPluginDocument(doc);
         node =  pluginDocument->pluginNode();
     }
     if (!node && doc->isHTMLDocument())
@@ skipping 567 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