Make Event.path() return a pre-calculated NodeList rather than calculating it dynamically.

Source/core/dom/EventContext.h

 /*
  * Copyright (C) 2010 Google Inc. 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
@@ skipping 11 matching lines @@
  * (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 EventContext_h
 #define EventContext_h
 
 #include "core/dom/EventTarget.h"
 #include "core/dom/Node.h"
+#include "core/dom/StaticNodeList.h"
 #include "core/dom/TreeScope.h"
 #include <wtf/RefPtr.h>
 
 namespace WebCore {
 
 class Event;
 class TouchList;
 
 class EventContext {
 public:
     // FIXME: Use ContainerNode instead of Node.
     EventContext(PassRefPtr<Node>, PassRefPtr<EventTarget> currentTarget, PassRefPtr<EventTarget> target);
     virtual ~EventContext();
 
     Node* node() const { return m_node.get(); }
     EventTarget* target() const { return m_target.get(); }
+    PassRefPtr<NodeList> eventPath() { return m_eventPath; }
+    void adoptEventPath(Vector<RefPtr<Node> >&);
+    void setEventPath(PassRefPtr<NodeList> nodeList) { m_eventPath = nodeList; }
+
     bool currentTargetSameAsTarget() const { return m_currentTarget.get() == m_target.get(); }
     virtual void handleLocalEvents(Event*) const;
     virtual bool isMouseOrFocusEventContext() const;
     virtual bool isTouchEventContext() const;
 
 protected:
 #ifndef NDEBUG
     bool isUnreachableNode(EventTarget*);
 #endif
     RefPtr<Node> m_node;
     RefPtr<EventTarget> m_currentTarget;
     RefPtr<EventTarget> m_target;
+    RefPtr<NodeList> m_eventPath;
 };
 
 typedef Vector<OwnPtr<EventContext>, 32> EventPath;
 
 class MouseOrFocusEventContext : public EventContext {
 public:
     MouseOrFocusEventContext(PassRefPtr<Node>, PassRefPtr<EventTarget> currentTarget, PassRefPtr<EventTarget> target);
     virtual ~MouseOrFocusEventContext();
     EventTarget* relatedTarget() const { return m_relatedTarget.get(); }
     void setRelatedTarget(PassRefPtr<EventTarget>);
@@ skipping 42 matching lines @@
 
 inline void MouseOrFocusEventContext::setRelatedTarget(PassRefPtr<EventTarget> relatedTarget)
 {
     ASSERT(!isUnreachableNode(relatedTarget.get()));
     m_relatedTarget = relatedTarget;
 }
 
 }
 
 #endif // EventContext_h