Turn styleWillChange |newStyle| into a reference

Source/core/rendering/RenderBlockFlow.cpp

 /*
  * Copyright (C) 2013 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 1801 matching lines @@
         ASSERT_NOT_REACHED();
     }
     return result;
 }
 
 void RenderBlockFlow::createFloatingObjects()
 {
     m_floatingObjects = adoptPtr(new FloatingObjects(this, isHorizontalWritingMode()));
 }
 
-void RenderBlockFlow::styleWillChange(StyleDifference diff, const RenderStyle* newStyle)
+void RenderBlockFlow::styleWillChange(StyleDifference diff, const RenderStyle& newStyle)
 {
     RenderStyle* oldStyle = style();
     s_canPropagateFloatIntoSibling = oldStyle ? !isFloatingOrOutOfFlowPositioned() && !avoidsFloats() : false;
-    if (oldStyle && parent() && diff == StyleDifferenceLayout && oldStyle->position() != newStyle->position()
-        && containsFloats() && !isFloating() && !isOutOfFlowPositioned() && newStyle->hasOutOfFlowPosition())
+    if (oldStyle && parent() && diff == StyleDifferenceLayout && oldStyle->position() != newStyle.position()
+        && containsFloats() && !isFloating() && !isOutOfFlowPositioned() && newStyle.hasOutOfFlowPosition())
             markAllDescendantsWithFloatsForLayout();
 
     RenderBlock::styleWillChange(diff, newStyle);
 }
 
 void RenderBlockFlow::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
 {
     RenderBlock::styleDidChange(diff, oldStyle);
 
     // After our style changed, if we lose our ability to propagate floats into next sibling
@@ skipping 959 matching lines @@
 RenderBlockFlow::RenderBlockFlowRareData& RenderBlockFlow::ensureRareData()
 {
     if (m_rareData)
         return *m_rareData;
 
     m_rareData = adoptPtr(new RenderBlockFlowRareData(this));
     return *m_rareData;
 }
 
 } // namespace WebCore