Turn styleWillChange |newStyle| into a reference

Source/core/rendering/RenderLayer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 3946 matching lines @@
     if (!oldStyle || !renderer()->style()->reflectionDataEquivalent(oldStyle)) {
         ASSERT(!oldStyle || diff >= StyleDifferenceLayout);
         updateReflectionInfo(oldStyle);
     }
 
     if (RuntimeEnabledFeatures::cssCompositingEnabled())
         m_blendInfo.updateBlendMode();
 
     updateDescendantDependentFlags();
 
-    if (!oldStyle || !renderer()->style()->transformDataEquivalent(oldStyle))
+    if (!oldStyle || !renderer()->style()->transformDataEquivalent(*oldStyle))
         updateTransform();
 
     bool didPaintWithFilters = false;
 
     {
         // https://code.google.com/p/chromium/issues/detail?id=343759
         DisableCompositingQueryAsserts disabler;
         if (paintsWithFilters())
             didPaintWithFilters = true;
         updateFilters(oldStyle, renderer()->style());
@@ skipping 205 matching lines @@
     }
 }
 
 void showLayerTree(const WebCore::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif