Convert some Shape code to use references

Source/core/rendering/RenderBlock.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. 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
@@ skipping 1382 matching lines @@
 
 void RenderBlock::imageChanged(WrappedImagePtr image, const IntRect*)
 {
     RenderBox::imageChanged(image);
 
     if (!parent() || !everHadLayout())
         return;
 
     ShapeValue* shapeValue = style()->shapeInside();
     if (shapeValue && shapeValue->image() && shapeValue->image()->data() == image) {
-        ShapeInsideInfo* shapeInsideInfo = ensureShapeInsideInfo();
-        shapeInsideInfo->markShapeAsDirty();
+        ShapeInsideInfo& shapeInsideInfo = ensureShapeInsideInfo();
+        shapeInsideInfo.markShapeAsDirty();
         markShapeInsideDescendantsForLayout();
     }
 }
 
 void RenderBlock::updateShapeInsideInfoAfterStyleChange(const ShapeValue* shapeInside, const ShapeValue* oldShapeInside)
 {
     // FIXME: A future optimization would do a deep comparison for equality.
     if (shapeInside == oldShapeInside)
         return;
 
     if (shapeInside) {
-        ShapeInsideInfo* shapeInsideInfo = ensureShapeInsideInfo();
-        shapeInsideInfo->markShapeAsDirty();
+        ShapeInsideInfo& shapeInsideInfo = ensureShapeInsideInfo();
+        shapeInsideInfo.markShapeAsDirty();
     } else {
         setShapeInsideInfo(nullptr);
         markShapeInsideDescendantsForLayout();
     }
 }
 
 static inline bool shapeInfoRequiresRelayout(const RenderBlock* block)
 {
     ShapeInsideInfo* info = block->shapeInsideInfo();
     if (info)
@@ skipping 3590 matching lines @@
 void RenderBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* markedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const RenderObject* obj) const
 {
     showRenderObject();
     for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRootBox())
         root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLabel2, obj, 1);
 }
 
 #endif
 
 } // namespace WebCore