Revert 177812 "Migrate touch events to EventHandlerRegistry"

trunk/Source/core/dom/Document.h

Index: trunk/Source/core/dom/Document.h
===================================================================
--- trunk/Source/core/dom/Document.h	(revision 177995)
+++ trunk/Source/core/dom/Document.h	(working copy)
@@ -176,6 +176,8 @@
 };
 const int numNodeListInvalidationTypes = InvalidateOnAnyAttrChange + 1;
 
+typedef HashCountedSet<Node*> TouchEventTargetSet;
+
 enum DocumentClass {
     DefaultDocumentClass = 0,
     HTMLDocumentClass = 1,
@@ -938,6 +940,21 @@
 
     void initDNSPrefetch();
 
+    bool hasTouchEventHandlers() const { return (m_touchEventTargets.get()) ? m_touchEventTargets->size() : false; }
+
+    // Called when a single touch event handler has been added or removed for a node.
+    // The Node should always be in this Document, except for child Documents which report
+    // themselves to their parent exactly once if they have any touch handlers.
+    // Handlers added/removed from the LocalDOMWindow are reported as the Document.
+    void didAddTouchEventHandler(Node*);
+    void didRemoveTouchEventHandler(Node* handler) { didRemoveTouchEventHandler(handler, false); }
+
+    // Called whenever all touch event handlers have been removed for a node (such as when the
+    // node itself is being removed from the document).
+    void didClearTouchEventHandlers(Node* handler) { didRemoveTouchEventHandler(handler, true); }
+
+    const TouchEventTargetSet* touchEventTargets() const { return m_touchEventTargets.get(); }
+
     bool isInDocumentWrite() { return m_writeRecursionDepth > 0; }
 
     IntSize initialViewportSize() const;
@@ -1135,6 +1152,8 @@
     void processHttpEquivXFrameOptions(const AtomicString& content);
     void processHttpEquivContentSecurityPolicy(const AtomicString& equiv, const AtomicString& content);
 
+    void didRemoveTouchEventHandler(Node*, bool clearAll);
+
     bool haveStylesheetsLoaded() const;
 
     void setHoverNode(PassRefPtrWillBeRawPtr<Node>);
@@ -1328,6 +1347,8 @@
     bool m_writeRecursionIsTooDeep;
     unsigned m_writeRecursionDepth;
 
+    OwnPtr<TouchEventTargetSet> m_touchEventTargets;
+
     RefPtrWillBeMember<ScriptedAnimationController> m_scriptedAnimationController;
     OwnPtr<MainThreadTaskRunner> m_taskRunner;
     OwnPtr<TextAutosizer> m_textAutosizer;