Have Document::markers() return a reference

Source/core/rendering/HitTestResult.cpp

 /*
  * Copyright (C) 2006, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 188 matching lines @@
 }
 
 String HitTestResult::spellingToolTip(TextDirection& dir) const
 {
     dir = LTR;
     // Return the tool tip string associated with this point, if any. Only markers associated with bad grammar
     // currently supply strings, but maybe someday markers associated with misspelled words will also.
     if (!m_innerNonSharedNode)
         return String();
 
-    DocumentMarker* marker = m_innerNonSharedNode->document().markers()->markerContainingPoint(m_hitTestLocation.point(), DocumentMarker::Grammar);
+    DocumentMarker* marker = m_innerNonSharedNode->document().markers().markerContainingPoint(m_hitTestLocation.point(), DocumentMarker::Grammar);
     if (!marker)
         return String();
 
     if (RenderObject* renderer = m_innerNonSharedNode->renderer())
         dir = renderer->style()->direction();
     return marker->description();
 }
 
 String HitTestResult::title(TextDirection& dir) const
 {
@@ skipping 125 matching lines @@
     return false;
 }
 
 bool HitTestResult::isMisspelled() const
 {
     if (!targetNode())
         return false;
     VisiblePosition pos(targetNode()->renderer()->positionForPoint(localPoint()));
     if (pos.isNull())
         return false;
-    return m_innerNonSharedNode->document().markers()->markersInRange(
+    return m_innerNonSharedNode->document().markers().markersInRange(
         makeRange(pos, pos).get(), DocumentMarker::MisspellingMarkers()).size() > 0;
 }
 
 bool HitTestResult::isOverLink() const
 {
     return m_innerURLElement && m_innerURLElement->isLink();
 }
 
 String HitTestResult::titleDisplayString() const
 {
@@ skipping 126 matching lines @@
 {
     for (Node* node = m_innerNode.get(); node; node = NodeRenderingTraversal::parent(node)) {
         if (node->isElementNode())
             return toElement(node);
     }
 
     return 0;
 }
 
 } // namespace WebCore