Have Document::markers() return a reference

Source/web/ContextMenuClientImpl.cpp

 /*
  * Copyright (C) 2009, 2012 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 140 matching lines @@
 }
 
 static String selectMisspellingAsync(LocalFrame* selectedFrame, DocumentMarker& marker)
 {
     VisibleSelection selection = selectedFrame->selection().selection();
     if (!selection.isCaretOrRange())
         return String();
 
     // Caret and range selections always return valid normalized ranges.
     RefPtr<Range> selectionRange = selection.toNormalizedRange();
-    Vector<DocumentMarker*> markers = selectedFrame->document()->markers()->markersInRange(selectionRange.get(), DocumentMarker::MisspellingMarkers());
+    Vector<DocumentMarker*> markers = selectedFrame->document()->markers().markersInRange(selectionRange.get(), DocumentMarker::MisspellingMarkers());
     if (markers.size() != 1)
         return String();
     marker = *markers[0];
 
     // Cloning a range fails only for invalid ranges.
     RefPtr<Range> markerRange = selectionRange->cloneRange(ASSERT_NO_EXCEPTION);
     markerRange->setStart(markerRange->startContainer(), marker.startOffset());
     markerRange->setEnd(markerRange->endContainer(), marker.endOffset());
 
     if (markerRange->text().stripWhiteSpace(&IsWhiteSpaceOrPunctuation) != selectionRange->text().stripWhiteSpace(&IsWhiteSpaceOrPunctuation))
@@ skipping 240 matching lines @@
         outputItems[i] = subItems[i];
     subMenuItems.swap(outputItems);
 }
 
 void ContextMenuClientImpl::populateCustomMenuItems(const WebCore::ContextMenu* defaultMenu, WebContextMenuData* data)
 {
     populateSubMenuItems(defaultMenu->items(), data->customItems);
 }
 
 } // namespace blink