Have Document::markers() return a reference

Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 2283 matching lines @@
             m_horizontalBarDamage = dirtyRect;
             m_hasHorizontalBarDamage = true;
         }
     } else {
         invalidateRect(dirtyRect);
     }
 }
 
 void FrameView::getTickmarks(Vector<IntRect>& tickmarks) const
 {
-    tickmarks = frame().document()->markers()->renderedRectsForMarkers(DocumentMarker::TextMatch);
+    tickmarks = frame().document()->markers().renderedRectsForMarkers(DocumentMarker::TextMatch);
 }
 
 IntRect FrameView::windowResizerRect() const
 {
     Page* page = frame().page();
     if (!page)
         return IntRect();
     return page->chrome().windowResizerRect();
 }
 
@@ skipping 346 matching lines @@
     FontCachePurgePreventer fontCachePurgePreventer;
 
     PaintBehavior oldPaintBehavior = m_paintBehavior;
 
     if (FrameView* parentView = parentFrameView()) {
         if (parentView->paintBehavior() & PaintBehaviorFlattenCompositingLayers)
             m_paintBehavior |= PaintBehaviorFlattenCompositingLayers;
     }
 
     if (m_paintBehavior == PaintBehaviorNormal)
-        document->markers()->invalidateRenderedRectsForMarkersInRect(rect);
+        document->markers().invalidateRenderedRectsForMarkersInRect(rect);
 
     if (document->printing())
         m_paintBehavior |= PaintBehaviorFlattenCompositingLayers;
 
     ASSERT(!m_isPainting);
     m_isPainting = true;
 
     // m_nodeToDraw is used to draw only one element (and its descendants)
     RenderObject* eltRenderer = m_nodeToDraw ? m_nodeToDraw->renderer() : 0;
     RenderLayer* rootLayer = renderView->layer();
@@ skipping 499 matching lines @@
 void FrameView::willRemoveScrollbar(Scrollbar* scrollbar, ScrollbarOrientation orientation)
 {
     ScrollableArea::willRemoveScrollbar(scrollbar, orientation);
     if (AXObjectCache* cache = axObjectCache()) {
         cache->remove(scrollbar);
         cache->handleScrollbarUpdate(this);
     }
 }
 
 } // namespace WebCore