[CSS Typed OM] Refactor is2D handling in CSSTransformComponents to match new spec

third_party/WebKit/Source/core/css/cssom/CSSScale.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CSSScale_h
 #define CSSScale_h
 
 #include "core/css/cssom/CSSTransformComponent.h"
 #include "core/geometry/DOMMatrix.h"
 
@@ skipping 20 matching lines @@
 
   // Getters and setters for attributes defined in the IDL.
   double x() const { return x_; }
   double y() const { return y_; }
   double z() const { return z_; }
   void setX(double x) { x_ = x; }
   void setY(double y) { y_ = y; }
   void setZ(double z) { z_ = z; }
 
   // Internal methods - from CSSTransformComponent.
-  TransformComponentType GetType() const override {
-    return is2d_ ? kScaleType : kScale3DType;
-  }
-  DOMMatrix* AsMatrix() const override {
+  TransformComponentType GetType() const final { return kScaleType; }
+  DOMMatrix* AsMatrix() const final {
     DOMMatrix* result = DOMMatrix::Create();
     return result->scaleSelf(x_, y_, z_);
   }
-  CSSFunctionValue* ToCSSValue() const override;
+  CSSFunctionValue* ToCSSValue() const final;
 
  private:
-  CSSScale(double x, double y) : x_(x), y_(y), z_(1), is2d_(true) {}
-  CSSScale(double x, double y, double z) : x_(x), y_(y), z_(z), is2d_(false) {}
+  CSSScale(double x, double y)
+      : CSSTransformComponent(true /* is2D */), x_(x), y_(y), z_(1) {}
+  CSSScale(double x, double y, double z)
+      : CSSTransformComponent(false /* is2D */), x_(x), y_(y), z_(z) {}
 
   double x_;
   double y_;
   double z_;
-  bool is2d_;
 };
 
 }  // namespace blink
 
 #endif