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

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 44 matching lines @@
 #include "core/css/StyleSheetList.h"
 #include "core/css/resolver/FontBuilder.h"
 #include "core/css/resolver/StyleResolver.h"
 #include "core/css/resolver/StyleResolverStats.h"
 #include "core/dom/AddConsoleMessageTask.h"
 #include "core/dom/Attr.h"
 #include "core/dom/CDATASection.h"
 #include "core/dom/Comment.h"
 #include "core/dom/ContextFeatures.h"
 #include "core/dom/DOMImplementation.h"
-#include "core/dom/DOMNamedFlowCollection.h"
 #include "core/dom/DocumentFragment.h"
 #include "core/dom/DocumentLifecycleNotifier.h"
 #include "core/dom/DocumentLifecycleObserver.h"
 #include "core/dom/DocumentMarkerController.h"
 #include "core/dom/DocumentType.h"
 #include "core/dom/Element.h"
 #include "core/dom/ElementDataCache.h"
 #include "core/dom/ElementTraversal.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/ExecutionContextTask.h"
 #include "core/dom/MainThreadTaskRunner.h"
 #include "core/dom/MutationObserver.h"
-#include "core/dom/NamedFlowCollection.h"
 #include "core/dom/NodeChildRemovalTracker.h"
 #include "core/dom/NodeFilter.h"
 #include "core/dom/NodeIterator.h"
 #include "core/dom/NodeRareData.h"
 #include "core/dom/NodeRenderStyle.h"
 #include "core/dom/NodeRenderingTraversal.h"
 #include "core/dom/NodeTraversal.h"
 #include "core/dom/NodeWithIndex.h"
 #include "core/dom/PostAttachCallbacks.h"
 #include "core/dom/ProcessingInstruction.h"
@@ skipping 941 matching lines @@
     ASSERT(qName == e->tagQName());
 
     return e.release();
 }
 
 bool Document::regionBasedColumnsEnabled() const
 {
     return settings() && settings()->regionBasedColumnsEnabled();
 }
 
-PassRefPtr<DOMNamedFlowCollection> Document::webkitGetNamedFlows()
-{
-    if (!RuntimeEnabledFeatures::cssRegionsEnabled() || !renderView())
-        return 0;
-
-    updateStyleIfNeeded();
-
-    return namedFlows()->createCSSOMSnapshot();
-}
-
-NamedFlowCollection* Document::namedFlows()
-{
-    if (!m_namedFlows)
-        m_namedFlows = NamedFlowCollection::create(this);
-
-    return m_namedFlows.get();
-}
-
 PassRefPtr<Element> Document::createElementNS(const AtomicString& namespaceURI, const AtomicString& qualifiedName, ExceptionState& exceptionState)
 {
     AtomicString prefix, localName;
     if (!parseQualifiedName(qualifiedName, prefix, localName, exceptionState))
         return 0;
 
     QualifiedName qName(prefix, localName, namespaceURI);
     if (!hasValidNamespaceForElements(qName)) {
         exceptionState.throwDOMException(NamespaceError, "The namespace URI provided ('" + namespaceURI + "') is not valid for the qualified name provided ('" + qualifiedName + "').");
         return 0;
@@ skipping 4386 matching lines @@
 void Document::defaultEventHandler(Event* event)
 {
     if (frame() && frame()->remotePlatformLayer()) {
         frame()->chromeClient().forwardInputEvent(this, event);
         return;
     }
     Node::defaultEventHandler(event);
 }
 
 } // namespace WebCore