Added a quick heuristic to determine which objects are the target of in-page links and stop ignorin…

third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp

 /*
  * Copyright (C) 2014, 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
@@ skipping 1159 matching lines @@
 
 void AXObjectCacheImpl::handleLoadComplete(Document* document) {
   postNotification(getOrCreate(document), AXObjectCache::AXLoadComplete);
 }
 
 void AXObjectCacheImpl::handleLayoutComplete(Document* document) {
   postNotification(getOrCreate(document), AXObjectCache::AXLayoutComplete);
 }
 
 void AXObjectCacheImpl::handleScrolledToAnchor(const Node* anchorNode) {
-  // The anchor node may not be accessible. Post the notification for the
-  // first accessible object.
-  postPlatformNotification(firstAccessibleObjectFromNode(anchorNode),
-                           AXScrolledToAnchor);
+  if (!anchorNode)
+    return;
+  AXObject* obj = getOrCreate(anchorNode->layoutObject());
+  if (!obj)
+    return;
+  if (obj->accessibilityIsIgnored())
+    obj = obj->parentObjectUnignored();
+  postPlatformNotification(obj, AXScrolledToAnchor);
 }
 
 void AXObjectCacheImpl::handleScrollPositionChanged(FrameView* frameView) {
   AXObject* targetAXObject = getOrCreate(frameView->frame().document());
   postPlatformNotification(targetAXObject, AXScrollPositionChanged);
 }
 
 void AXObjectCacheImpl::handleScrollPositionChanged(
     LayoutObject* layoutObject) {
   postPlatformNotification(getOrCreate(layoutObject), AXScrollPositionChanged);
@@ skipping 45 matching lines @@
   visitor->trace(m_document);
   visitor->trace(m_nodeObjectMapping);
 
   visitor->trace(m_objects);
   visitor->trace(m_notificationsToPost);
 
   AXObjectCache::trace(visitor);
 }
 
 }  // namespace blink