Have Node::document() return a reference instead of a pointer

Source/core/rendering/InlineFlowBox.cpp

 /*
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *
  * 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 1022 matching lines @@
     }
 
     // Now check ourselves. Pixel snap hit testing.
     LayoutRect frameRect = roundedFrameRect();
     LayoutUnit minX = frameRect.x();
     LayoutUnit minY = frameRect.y();
     LayoutUnit width = frameRect.width();
     LayoutUnit height = frameRect.height();
 
     // Constrain our hit testing to the line top and bottom if necessary.
-    bool noQuirksMode = renderer()->document()->inNoQuirksMode();
+    bool noQuirksMode = renderer()->document().inNoQuirksMode();
     if (!noQuirksMode && !hasTextChildren() && !(descendantsHaveSameLineHeightAndBaseline() && hasTextDescendants())) {
         RootInlineBox* rootBox = root();
         LayoutUnit& top = isHorizontal() ? minY : minX;
         LayoutUnit& logicalHeight = isHorizontal() ? height : width;
         LayoutUnit bottom = min(rootBox->lineBottom(), top + logicalHeight);
         top = max(rootBox->lineTop(), top);
         logicalHeight = bottom - top;
     }
 
     // Move x/y to our coordinates.
@@ skipping 147 matching lines @@
         boxModelObject()->paintBoxShadow(info, paintRect, s, shadowStyle);
     else {
         // FIXME: We can do better here in the multi-line case. We want to push a clip so that the shadow doesn't
         // protrude incorrectly at the edges, and we want to possibly include shadows cast from the previous/following lines
         boxModelObject()->paintBoxShadow(info, paintRect, s, shadowStyle, includeLogicalLeftEdge(), includeLogicalRightEdge());
     }
 }
 
 void InlineFlowBox::constrainToLineTopAndBottomIfNeeded(LayoutRect& rect) const
 {
-    bool noQuirksMode = renderer()->document()->inNoQuirksMode();
+    bool noQuirksMode = renderer()->document().inNoQuirksMode();
     if (!noQuirksMode && !hasTextChildren() && !(descendantsHaveSameLineHeightAndBaseline() && hasTextDescendants())) {
         const RootInlineBox* rootBox = root();
         LayoutUnit logicalTop = isHorizontal() ? rect.y() : rect.x();
         LayoutUnit logicalHeight = isHorizontal() ? rect.height() : rect.width();
         LayoutUnit bottom = min(rootBox->lineBottom(), logicalTop + logicalHeight);
         logicalTop = max(rootBox->lineTop(), logicalTop);
         logicalHeight = bottom - logicalTop;
         if (isHorizontal()) {
             rect.setY(logicalTop);
             rect.setHeight(logicalHeight);
@@ skipping 414 matching lines @@
         ASSERT(child->prevOnLine() == prev);
         prev = child;
     }
     ASSERT(prev == m_lastChild);
 #endif
 }
 
 #endif
 
 } // namespace WebCore