Move NoEventDispatchAssertion class to its own file

Source/core/dom/ContainerNode.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2011 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef ContainerNode_h
 #define ContainerNode_h
 
 #include "bindings/v8/ExceptionStatePlaceholder.h"
 #include "core/dom/Node.h"
 #include "wtf/OwnPtr.h"
-#include "wtf/TemporaryChange.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
 class ExceptionState;
 class FloatPoint;
 class HTMLCollection;
 
 namespace Private {
     template<class GenericNode, class GenericNodeContainer>
     void addChildNodesToDeletionQueue(GenericNode*& head, GenericNode*& tail, GenericNodeContainer&);
 }
 
-#ifndef NDEBUG
-// FIXME: Move this class to its own file.
-class NoEventDispatchAssertion {
-public:
-    NoEventDispatchAssertion()
-    {
-        if (!isMainThread())
-            return;
-        s_count++;
-    }
-
-    ~NoEventDispatchAssertion()
-    {
-        if (!isMainThread())
-            return;
-        ASSERT(s_count);
-        s_count--;
-    }
-
-    static bool isEventDispatchForbidden()
-    {
-        if (!isMainThread())
-            return false;
-        return s_count;
-    }
-
-    // It's safe to dispatch events in SVGImage since there can't be any script
-    // listeners.
-    class AllowSVGImageEvents {
-    public:
-        AllowSVGImageEvents()
-            : m_change(s_count, 0)
-        {
-        }
-
-        ~AllowSVGImageEvents()
-        {
-            ASSERT(!s_count);
-        }
-
-        TemporaryChange<unsigned> m_change;
-    };
-
-private:
-    static unsigned s_count;
-};
-#else
-class NoEventDispatchAssertion {
-public:
-    NoEventDispatchAssertion() { }
-    class AllowSVGImageEvents {
-    public:
-        AllowSVGImageEvents() { }
-    };
-};
-#endif
-
 enum DynamicRestyleFlags {
     ChildrenAffectedByFocus = 1 << 0,
     ChildrenAffectedByHover = 1 << 1,
     ChildrenAffectedByActive = 1 << 2,
     ChildrenAffectedByDrag = 1 << 3,
     ChildrenAffectedByFirstChildRules = 1 << 4,
     ChildrenAffectedByLastChildRules = 1 << 5,
     ChildrenAffectedByDirectAdjacentRules = 1 << 6,
     ChildrenAffectedByIndirectAdjacentRules = 1 << 7,
     ChildrenAffectedByForwardPositionalRules = 1 << 8,
@@ skipping 254 matching lines @@
 inline void getChildNodes(Node& node, NodeVector& nodes)
 {
     ASSERT(!nodes.size());
     for (Node* child = node.firstChild(); child; child = child->nextSibling())
         nodes.append(child);
 }
 
 } // namespace WebCore
 
 #endif // ContainerNode_h