Remove CSS regions support, keeping a bare minimum to support "region-based" multicol.

Source/core/dom/Element.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2013 Apple 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
@@ skipping 16 matching lines @@
 
 #include "CSSPropertyNames.h"
 #include "HTMLNames.h"
 #include "core/css/CSSPrimitiveValue.h"
 #include "core/dom/Attribute.h"
 #include "core/dom/Document.h"
 #include "core/dom/ElementData.h"
 #include "core/dom/SpaceSplitString.h"
 #include "core/html/CollectionType.h"
 #include "core/page/FocusType.h"
-#include "core/rendering/RegionOversetState.h"
 #include "platform/scroll/ScrollTypes.h"
 
 namespace WebCore {
 
 class ActiveAnimations;
 class Attr;
 class Attribute;
 class ClientRect;
 class ClientRectList;
 class DOMStringMap;
 class DOMTokenList;
 class ElementRareData;
 class ElementShadow;
 class ExceptionState;
 class Image;
 class InputMethodContext;
 class IntSize;
 class Locale;
 class MutableStylePropertySet;
 class PropertySetCSSStyleDeclaration;
 class PseudoElement;
-class RenderRegion;
 class ShadowRoot;
 class StylePropertySet;
 
 enum AffectedSelectorType {
     AffectedSelectorChecked = 1,
     AffectedSelectorEnabled = 1 << 1,
     AffectedSelectorDisabled = 1 << 2,
     AffectedSelectorIndeterminate = 1 << 3,
     AffectedSelectorLink = 1 << 4,
     AffectedSelectorTarget = 1 << 5,
@@ skipping 282 matching lines @@
     void setChildrenAffectedByForwardPositionalRules();
     void setChildrenAffectedByBackwardPositionalRules();
     void setChildIndex(unsigned);
 
     void setIsInCanvasSubtree(bool);
     bool isInCanvasSubtree() const;
 
     bool isUpgradedCustomElement() { return customElementState() == Upgraded; }
     bool isUnresolvedCustomElement() { return customElementState() == WaitingForUpgrade; }
 
-    void setIsInsideRegion(bool);
-    bool isInsideRegion() const;
-
-    void setRegionOversetState(RegionOversetState);
-    RegionOversetState regionOversetState() const;
-
     AtomicString computeInheritedLanguage() const;
     Locale& locale() const;
 
     virtual void accessKeyAction(bool /*sendToAnyEvent*/) { }
 
     virtual bool isURLAttribute(const Attribute&) const { return false; }
     virtual bool isHTMLContentAttribute(const Attribute&) const { return false; }
 
     KURL getURLAttribute(const QualifiedName&) const;
     KURL getNonEmptyURLAttribute(const QualifiedName&) const;
@@ skipping 118 matching lines @@
     bool isInTopLayer() const;
     void setIsInTopLayer(bool);
 
     void webkitRequestPointerLock();
 
     bool isSpellCheckingEnabled() const;
 
     // FIXME: public for RenderTreeBuilder, we shouldn't expose this though.
     PassRefPtr<RenderStyle> styleForRenderer();
 
-    RenderRegion* renderRegion() const;
-    const AtomicString& webkitRegionOverset() const;
-    Vector<RefPtr<Range> > webkitGetRegionFlowRanges() const;
-
     bool hasID() const;
     bool hasClass() const;
     const SpaceSplitString& classNames() const;
 
     IntSize savedLayerScrollOffset() const;
     void setSavedLayerScrollOffset(const IntSize&);
 
     ActiveAnimations* activeAnimations() const;
     ActiveAnimations* ensureActiveAnimations();
     bool hasActiveAnimations() const;
@@ skipping 137 matching lines @@
     bool rareDataChildrenAffectedByDirectAdjacentRules() const;
     bool rareDataChildrenAffectedByForwardPositionalRules() const;
     bool rareDataChildrenAffectedByBackwardPositionalRules() const;
     unsigned rareDataChildIndex() const;
 
     SpellcheckAttributeState spellcheckAttributeState() const;
 
     void updateNamedItemRegistration(const AtomicString& oldName, const AtomicString& newName);
     void updateExtraNamedItemRegistration(const AtomicString& oldName, const AtomicString& newName);
 
-    void unregisterNamedFlowContentNode();
-
     void createUniqueElementData();
 
     bool shouldInvalidateDistributionWhenAttributeChanged(ElementShadow*, const QualifiedName&, const AtomicString&);
 
     ElementRareData* elementRareData() const;
     ElementRareData& ensureElementRareData();
 
     void detachAllAttrNodesFromElement();
     void detachAttrNodeFromElementWithValue(Attr*, const AtomicString& value);
     void detachAttrNodeAtIndex(Attr*, size_t index);
@@ skipping 191 matching lines @@
 }
 
 inline bool isShadowHost(const Element* element)
 {
     return element && element->shadow();
 }
 
 } // namespace
 
 #endif