*** DO NOT LAND *** Remove regions support, keeping a bare minimum to support "region-based"...

Source/core/dom/Document.h

Index: Source/core/dom/Document.h
diff --git a/Source/core/dom/Document.h b/Source/core/dom/Document.h
index b5bc1f05671d68146e46fb77709ea5d445170663..f374a354fcf3bdd3bba41c68394bc5861d5ee59e 100644
--- a/Source/core/dom/Document.h
+++ b/Source/core/dom/Document.h
@@ -77,7 +77,6 @@ class ContentSecurityPolicyResponseHeaders;
 class ContextFeatures;
 class CustomElementRegistrationContext;
 class DOMImplementation;
-class DOMNamedFlowCollection;
 class DOMSelection;
 class DOMWindow;
 class DOMWrapperWorld;
@@ -130,7 +129,6 @@ class MainThreadTaskRunner;
 class MediaQueryList;
 class MediaQueryMatcher;
 class MouseEventWithHitTestResults;
-class NamedFlowCollection;
 class NodeFilter;
 class NodeIterator;
 class Page;
@@ -323,10 +321,6 @@ public:
     PassRefPtr<Element> createElementNS(const AtomicString& namespaceURI, const AtomicString& qualifiedName, ExceptionState&);
     PassRefPtr<Element> createElement(const QualifiedName&, bool createdByParser);
 
-    PassRefPtr<DOMNamedFlowCollection> webkitGetNamedFlows();
-
-    NamedFlowCollection* namedFlows();
-
     bool regionBasedColumnsEnabled() const;
 
     /**
@@ -1301,8 +1295,6 @@ private:
 
     RefPtr<CustomElementRegistrationContext> m_registrationContext;
 
-    RefPtr<NamedFlowCollection> m_namedFlows;
-
     void sharedObjectPoolClearTimerFired(Timer<Document>*);
     Timer<Document> m_sharedObjectPoolClearTimer;