Remove some unused functions in core

Source/core/dom/Document.h

 /*
  * 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, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 787 matching lines @@
     bool queryCommandIndeterm(const String& command);
     bool queryCommandState(const String& command);
     bool queryCommandSupported(const String& command);
     String queryCommandValue(const String& command);
 
     KURL openSearchDescriptionURL();
 
     // designMode support
     enum InheritedBool { off = false, on = true, inherit };
     void setDesignMode(InheritedBool value);
-    InheritedBool getDesignMode() const;
     bool inDesignMode() const;
     String designMode() const;
     void setDesignMode(const String&);
 
     Document* parentDocument() const;
     Document& topDocument() const;
     WeakPtrWillBeRawPtr<Document> contextDocument();
 
     ScriptRunner* scriptRunner() { return m_scriptRunner.get(); }
 
@@ skipping 132 matching lines @@
     void cancelAnimationFrame(int id);
     void serviceScriptedAnimations(double monotonicAnimationStartTime);
 
     virtual EventTarget* errorEventTarget() override final;
     virtual void logExceptionToConsole(const String& errorMessage, int scriptId, const String& sourceURL, int lineNumber, int columnNumber, PassRefPtrWillBeRawPtr<ScriptCallStack>) override final;
 
     void initDNSPrefetch();
 
     bool isInDocumentWrite() { return m_writeRecursionDepth > 0; }
 
-    IntSize initialViewportSize() const;
-
     TextAutosizer* textAutosizer();
 
     PassRefPtrWillBeRawPtr<Element> createElement(const AtomicString& localName, const AtomicString& typeExtension, ExceptionState&);
     PassRefPtrWillBeRawPtr<Element> createElementNS(const AtomicString& namespaceURI, const AtomicString& qualifiedName, const AtomicString& typeExtension, ExceptionState&);
-    ScriptValue registerElement(ScriptState*, const AtomicString& name, ExceptionState&);
     ScriptValue registerElement(ScriptState*, const AtomicString& name, const ElementRegistrationOptions&, ExceptionState&, CustomElement::NameSet validNames = CustomElement::StandardNames);
     CustomElementRegistrationContext* registrationContext() { return m_registrationContext.get(); }
     CustomElementMicrotaskRunQueue* customElementMicrotaskRunQueue();
 
     void setImportsController(HTMLImportsController*);
     HTMLImportsController* importsController() const { return m_importsController; }
     HTMLImportLoader* importLoader() const;
 
     bool haveImportsLoaded() const;
     void didLoadAllImports();
@@ skipping 452 matching lines @@
 DEFINE_TYPE_CASTS(TreeScope, Document, document, true, true);
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showLiveDocumentInstances();
 #endif
 
 #endif // Document_h