Implement elementsFromPoint

Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 1224 matching lines @@
 }
 
 Element* Document::elementFromPoint(int x, int y) const
 {
     if (!renderView())
         return 0;
 
     return TreeScope::elementFromPoint(x, y);
 }
 
+Vector<Element*> Document::elementsFromPoint(int x, int y) const
+{
+    if (!renderView())
+        return Vector<Element*>();
+    return TreeScope::elementsFromPoint(x, y);
+}
+
 PassRefPtrWillBeRawPtr<Range> Document::caretRangeFromPoint(int x, int y)
 {
     if (!renderView())
         return nullptr;
     HitTestResult result = hitTestInDocument(this, x, y);
     LayoutObject* renderer = result.renderer();
     if (!renderer)
         return nullptr;
 
     Node* node = renderer->node();
@@ skipping 4486 matching lines @@
 #ifndef NDEBUG
 using namespace blink;
 void showLiveDocumentInstances()
 {
     WeakDocumentSet& set = liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().string().utf8().data());
 }
 #endif