[SVG2] The exposed event target should be the <use> element.

Source/core/events/EventPath.cpp

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 25 matching lines @@
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/events/FocusEvent.h"
 #include "core/events/MouseEvent.h"
 #include "core/events/TouchEvent.h"
 #include "core/events/TouchEventContext.h"
 #include "core/svg/SVGUseElement.h"
 #include "platform/RuntimeEnabledFeatures.h"
 
 namespace WebCore {
 
-// SVG1.1 specified that the <use> instance tree would expose the target
-// element for events. This has been deprecated and will be removed.
-// See: crbug.com/313438
-static bool usesDeprecatedSVGUseTreeEventRules(Node* node)
-{
-    return node->isSVGElement() && toSVGElement(node)->inUseShadowTree();
-}
-
 EventTarget* EventPath::eventTargetRespectingTargetRules(Node* referenceNode)
 {
     ASSERT(referenceNode);
 
     if (referenceNode->isPseudoElement())
         return referenceNode->parentNode();
 
     return referenceNode;
 }
 
@@ skipping 37 matching lines @@
 }
 
 void EventPath::resetWith(Node* node)
 {
     ASSERT(node);
     m_node = node;
     m_nodeEventContexts.clear();
     m_treeScopeEventContexts.clear();
     calculatePath();
     calculateAdjustedTargets();
-    if (!usesDeprecatedSVGUseTreeEventRules(node))
-        calculateTreeScopePrePostOrderNumbers();
+    calculateTreeScopePrePostOrderNumbers();
 }
 
 void EventPath::addNodeEventContext(Node* node)
 {
     m_nodeEventContexts.append(NodeEventContext(node, eventTargetRespectingTargetRules(node)));
 }
 
 void EventPath::calculatePath()
 {
     ASSERT(m_node);
@@ skipping 81 matching lines @@
         }
     } else if (!treeScopeEventContext->target() && currentTarget) {
         treeScopeEventContext->setTarget(eventTargetRespectingTargetRules(currentTarget));
     }
     return treeScopeEventContext;
 }
 
 void EventPath::calculateAdjustedTargets()
 {
     const TreeScope* lastTreeScope = 0;
-    bool useDeprecatedSVGUseTreeEventRules = usesDeprecatedSVGUseTreeEventRules(at(0).node());
 
     TreeScopeEventContextMap treeScopeEventContextMap;
     TreeScopeEventContext* lastTreeScopeEventContext = 0;
 
     for (size_t i = 0; i < size(); ++i) {
         Node* currentNode = at(i).node();
         TreeScope& currentTreeScope = currentNode->treeScope();
         if (lastTreeScope != &currentTreeScope) {
-            if (!useDeprecatedSVGUseTreeEventRules) {
-                lastTreeScopeEventContext = ensureTreeScopeEventContext(currentNode, &currentTreeScope, treeScopeEventContextMap);
-            } else {
-                TreeScopeEventContextMap::AddResult addResult = treeScopeEventContextMap.add(&currentTreeScope, TreeScopeEventContext::create(currentTreeScope));
-                lastTreeScopeEventContext = addResult.storedValue->value.get();
-                if (addResult.isNewEntry) {
-                    // Don't adjust an event target for SVG.
-                    lastTreeScopeEventContext->setTarget(eventTargetRespectingTargetRules(at(0).node()));
-                }
-            }
+            lastTreeScopeEventContext = ensureTreeScopeEventContext(currentNode, &currentTreeScope, treeScopeEventContextMap);
         }
         ASSERT(lastTreeScopeEventContext);
         at(i).setTreeScopeEventContext(lastTreeScopeEventContext);
         lastTreeScope = &currentTreeScope;
     }
     m_treeScopeEventContexts.appendRange(treeScopeEventContextMap.values().begin(), treeScopeEventContextMap.values().end());
 }
 
 void EventPath::buildRelatedNodeMap(const Node* relatedNode, RelatedTargetMap& relatedTargetMap)
 {
@@ skipping 121 matching lines @@
 }
 #endif
 
 void EventPath::trace(Visitor* visitor)
 {
     visitor->trace(m_nodeEventContexts);
     visitor->trace(m_event);
 }
 
 } // namespace