Incorporate ComputedStyle::hasTransform when diffing transform styles.

third_party/WebKit/Source/core/paint/PaintLayer.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. 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>
@@ skipping 1232 matching lines @@
   std::unique_ptr<PaintLayerStackingNode> m_stackingNode;
 
   IntSize m_previousScrollOffsetAccumulationForPainting;
   RefPtr<ClipRects> m_previousPaintingClipRects;
   LayoutRect m_previousPaintDirtyRect;
 
   std::unique_ptr<PaintLayerRareData> m_rareData;
 
   FRIEND_TEST_ALL_PREFIXES(PaintLayerTest,
                            DescendantDependentFlagsStopsAtThrottledFrames);
+  FRIEND_TEST_ALL_PREFIXES(PaintLayerTest,
+                           PaintLayerTransformUpdatedOnStyleTransformAnimation);
 };
 
 }  // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 CORE_EXPORT void showLayerTree(const blink::PaintLayer*);
 CORE_EXPORT void showLayerTree(const blink::LayoutObject*);
 #endif
 
 #endif  // Layer_h