Don't use post multiplication on transforms with compatible pairs of operations

third_party/WebKit/Source/platform/transforms/RotateTransformOperation.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * 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 48 matching lines @@
   const FloatPoint3D& axis() const { return m_rotation.axis; }
 
   static bool getCommonAxis(const RotateTransformOperation*,
                             const RotateTransformOperation*,
                             FloatPoint3D& resultAxis,
                             double& resultAngleA,
                             double& resultAngleB);
 
   virtual bool canBlendWith(const TransformOperation& other) const;
   OperationType type() const override { return m_type; }
+  OperationType primitiveType() const final { return Rotate3D; }
 
   void apply(TransformationMatrix& transform,
              const FloatSize& /*borderBoxSize*/) const override {
     transform.rotate3d(m_rotation);
   }
 
   static bool isMatchingOperationType(OperationType type) {
     return type == Rotate || type == RotateX || type == RotateY ||
            type == RotateZ || type == Rotate3D;
   }
@@ skipping 45 matching lines @@
 
   double m_originX;
   double m_originY;
 };
 
 DEFINE_TRANSFORM_TYPE_CASTS(RotateAroundOriginTransformOperation);
 
 }  // namespace blink
 
 #endif  // RotateTransformOperation_h