Fix squashing to treat perspective and preserve3d elements as transform ancestors.

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 889 matching lines @@
     RenderLayer* curr = parent();
     while (curr && !curr->isPositionedContainer())
         curr = curr->parent();
 
     return curr;
 }
 
 RenderLayer* RenderLayer::enclosingTransformedAncestor() const
 {
     RenderLayer* curr = parent();
-    while (curr && !curr->isRootLayer() && !curr->transform())
+    while (curr && !curr->isRootLayer() && !curr->renderer()->hasTransform())
         curr = curr->parent();
 
     return curr;
 }
 
 LayoutPoint RenderLayer::computeOffsetFromTransformedAncestor() const
 {
     const AncestorDependentCompositingInputs& properties = ancestorDependentCompositingInputs();
 
     TransformState transformState(TransformState::ApplyTransformDirection, FloatPoint());
@@ skipping 2787 matching lines @@
     }
 }
 
 void showLayerTree(const blink::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif