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

Source/core/rendering/RenderObject.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2009 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
@@ skipping 42 matching lines @@
 class Path;
 class Position;
 class PseudoStyleRequest;
 class RenderBoxModelObject;
 class RenderInline;
 class RenderBlock;
 class RenderFlowThread;
 class RenderGeometryMap;
 class RenderLayer;
 class RenderLayerModelObject;
-class RenderNamedFlowThread;
 class RenderSVGResourceContainer;
 class RenderTable;
 class RenderTheme;
 class RenderView;
 class ResourceLoadPriorityOptimizer;
 class TransformState;
 
 struct PaintInfo;
 
 enum CursorDirective {
@@ skipping 130 matching lines @@
 
     // Function to return our enclosing flow thread if we are contained inside one. This
     // function follows the containing block chain.
     RenderFlowThread* flowThreadContainingBlock() const
     {
         if (flowThreadState() == NotInsideFlowThread)
             return 0;
         return locateFlowThreadContainingBlock();
     }
 
-    RenderNamedFlowThread* renderNamedFlowThreadWrapper() const;
-
     virtual bool isEmpty() const { return firstChild() == 0; }
 
 #ifndef NDEBUG
     void setHasAXObject(bool flag) { m_hasAXObject = flag; }
     bool hasAXObject() const { return m_hasAXObject; }
 
     // Helper class forbidding calls to setNeedsLayout() during its lifetime.
     class SetLayoutNeededForbiddenScope {
     public:
         explicit SetLayoutNeededForbiddenScope(RenderObject*);
@@ skipping 112 matching lines @@
     virtual bool isMeter() const { return false; }
     virtual bool isProgress() const { return false; }
     virtual bool isRenderBlock() const { return false; }
     virtual bool isRenderBlockFlow() const { return false; }
     virtual bool isRenderButton() const { return false; }
     virtual bool isRenderIFrame() const { return false; }
     virtual bool isRenderImage() const { return false; }
     virtual bool isRenderInline() const { return false; }
     virtual bool isRenderPart() const { return false; }
     virtual bool isRenderRegion() const { return false; }
-    virtual bool isRenderNamedFlowFragment() const { return false; }
     virtual bool isRenderView() const { return false; }
     virtual bool isReplica() const { return false; }
 
     virtual bool isRuby() const { return false; }
     virtual bool isRubyBase() const { return false; }
     virtual bool isRubyRun() const { return false; }
     virtual bool isRubyText() const { return false; }
 
     virtual bool isSlider() const { return false; }
     virtual bool isSliderThumb() const { return false; }
     virtual bool isTable() const { return false; }
     virtual bool isTableCell() const { return false; }
     virtual bool isRenderTableCol() const { return false; }
     virtual bool isTableCaption() const { return false; }
     virtual bool isTableRow() const { return false; }
     virtual bool isTableSection() const { return false; }
     virtual bool isTextControl() const { return false; }
     virtual bool isTextArea() const { return false; }
     virtual bool isTextField() const { return false; }
     virtual bool isVideo() const { return false; }
     virtual bool isWidget() const { return false; }
     virtual bool isCanvas() const { return false; }
     virtual bool isRenderFullScreen() const { return false; }
     virtual bool isRenderFullScreenPlaceholder() const { return false; }
 
     virtual bool isRenderGrid() const { return false; }
 
     virtual bool isRenderFlowThread() const { return false; }
-    virtual bool isRenderNamedFlowThread() const { return false; }
     bool isInFlowRenderFlowThread() const { return isRenderFlowThread() && !isOutOfFlowPositioned(); }
     bool isOutOfFlowRenderFlowThread() const { return isRenderFlowThread() && isOutOfFlowPositioned(); }
-    bool isRenderNamedFlowFragmentContainer() const;
 
     virtual bool isRenderMultiColumnBlock() const { return false; }
     virtual bool isRenderMultiColumnSet() const { return false; }
 
     virtual bool isRenderScrollbarPart() const { return false; }
 
     bool isRoot() const { return document().documentElement() == m_node; }
     bool isBody() const;
     bool isHR() const;
     bool isLegend() const;
@@ skipping 212 matching lines @@
     Frame* frame() const { return document().frame(); }
 
     bool hasOutlineAnnotation() const;
     bool hasOutline() const { return style()->hasOutline() || hasOutlineAnnotation(); }
 
     // Returns the object containing this one. Can be different from parent for positioned elements.
     // If repaintContainer and repaintContainerSkipped are not null, on return *repaintContainerSkipped
     // is true if the renderer returned is an ancestor of repaintContainer.
     RenderObject* container(const RenderLayerModelObject* repaintContainer = 0, bool* repaintContainerSkipped = 0) const;
 
-    virtual RenderObject* hoverAncestor() const;
+    virtual RenderObject* hoverAncestor() const { return parent(); }
 
     Element* offsetParent() const;
 
     void markContainingBlocksForLayout(bool scheduleRelayout = true, RenderObject* newRoot = 0, SubtreeLayoutScope* = 0);
     void setNeedsLayout(MarkingBehavior = MarkContainingBlockChain, SubtreeLayoutScope* = 0);
     void clearNeedsLayout();
     void setChildNeedsLayout(MarkingBehavior = MarkContainingBlockChain, SubtreeLayoutScope* = 0);
     void setNeedsPositionedMovementLayout();
     void setNeedsSimplifiedNormalFlowLayout();
     void setPreferredLogicalWidthsDirty(MarkingBehavior = MarkContainingBlockChain);
@@ skipping 784 matching lines @@
 void showTree(const WebCore::RenderObject*);
 void showLineTree(const WebCore::RenderObject*);
 void showRenderTree(const WebCore::RenderObject* object1);
 // We don't make object2 an optional parameter so that showRenderTree
 // can be called from gdb easily.
 void showRenderTree(const WebCore::RenderObject* object1, const WebCore::RenderObject* object2);
 
 #endif
 
 #endif // RenderObject_h