Return Frame&, not Frame* from RenderView::frame()

Source/core/rendering/RenderTreeAsText.cpp

 /*
  * Copyright (C) 2004, 2006, 2007 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 501 matching lines @@
     for (RenderObject* child = o.firstChild(); child; child = child->nextSibling()) {
         if (child->hasLayer())
             continue;
         write(ts, *child, indent + 1, behavior);
     }
 
     if (o.isWidget()) {
         Widget* widget = toRenderWidget(&o)->widget();
         if (widget && widget->isFrameView()) {
             FrameView* view = toFrameView(widget);
-            RenderView* root = view->frame()->contentRenderer();
+            RenderView* root = view->frame().contentRenderer();
             if (root) {
                 view->layout();
                 RenderLayer* l = root->layer();
                 if (l)
                     writeLayers(ts, l, l, l->rect(), indent + 1, behavior);
             }
         }
     }
 }
 
@@ skipping 316 matching lines @@
     element->document().updateLayout();
 
     RenderObject* renderer = element->renderer();
     if (!renderer || !renderer->isListItem())
         return String();
 
     return toRenderListItem(renderer)->markerText();
 }
 
 } // namespace WebCore