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

Source/core/dom/NamedFlow.h

Index: Source/core/dom/NamedFlow.h
diff --git a/Source/core/dom/NamedFlow.h b/Source/core/dom/NamedFlow.h
deleted file mode 100644
index 05d76f26c7eafecf94d9a4c02b493c91db1be747..0000000000000000000000000000000000000000
--- a/Source/core/dom/NamedFlow.h
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above
- *    copyright notice, this list of conditions and the following
- *    disclaimer.
- * 2. Redistributions in binary form must reproduce the above
- *    copyright notice, this list of conditions and the following
- *    disclaimer in the documentation and/or other materials
- *    provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
- * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
- * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef NamedFlow_h
-#define NamedFlow_h
-
-#include "bindings/v8/ScriptWrappable.h"
-#include "core/events/EventTarget.h"
-#include "wtf/RefCounted.h"
-#include "wtf/RefPtr.h"
-#include "wtf/text/AtomicString.h"
-
-namespace WebCore {
-
-class Document;
-class NamedFlowCollection;
-class Node;
-class NodeList;
-class RenderNamedFlowThread;
-class ExecutionContext;
-
-class NamedFlow FINAL : public RefCounted<NamedFlow>, public ScriptWrappable, public EventTargetWithInlineData {
-    REFCOUNTED_EVENT_TARGET(NamedFlow);
-public:
-    static PassRefPtr<NamedFlow> create(PassRefPtr<NamedFlowCollection> manager, const AtomicString& flowThreadName);
-
-    virtual ~NamedFlow();
-
-    const AtomicString& name() const;
-    bool overset() const;
-    int firstEmptyRegionIndex() const;
-    PassRefPtr<NodeList> getRegionsByContent(Node*);
-    PassRefPtr<NodeList> getRegions();
-    PassRefPtr<NodeList> getContent();
-
-    virtual const AtomicString& interfaceName() const OVERRIDE;
-    virtual ExecutionContext* executionContext() const OVERRIDE;
-
-    // This function is called from the JS binding code to determine if the NamedFlow object is reachable or not.
-    // If the object has listeners, the object should only be discarded if the parent Document is not reachable.
-    Node* ownerNode() const;
-
-    void setRenderer(RenderNamedFlowThread* parentFlowThread);
-
-    enum FlowState {
-        FlowStateCreated,
-        FlowStateNull
-    };
-
-    FlowState flowState() const { return m_parentFlowThread ? FlowStateCreated : FlowStateNull; }
-
-    void dispatchRegionLayoutUpdateEvent();
-    void dispatchRegionOversetChangeEvent();
-
-private:
-    NamedFlow(PassRefPtr<NamedFlowCollection>, const AtomicString&);
-
-    // The name of the flow thread as specified in CSS.
-    AtomicString m_flowThreadName;
-
-    RefPtr<NamedFlowCollection> m_flowManager;
-    RenderNamedFlowThread* m_parentFlowThread;
-};
-
-}
-
-#endif