[CSS Typed OM] Re-implement ToCSSValue and AsMatrix for CSSRotation

third_party/WebKit/Source/core/css/cssom/CSSRotation.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 CSSRotation_h
 #define CSSRotation_h
 
 #include "core/css/cssom/CSSNumericValue.h"
 #include "core/css/cssom/CSSTransformComponent.h"
 
@@ skipping 31 matching lines @@
   double x() const { return x_; }
   double y() const { return y_; }
   double z() const { return z_; }
   void setAngle(CSSNumericValue* angle, ExceptionState&);
   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 final { return kRotationType; }
-  DOMMatrix* AsMatrix() const final {
-    return nullptr;
-    // TODO(meade): Implement.
-    // return z_ == 1 ?
-    //           ? CSSMatrixComponent::Rotate(
-    //              angle_->to(CSSPrimitiveValue::UnitType::kDegrees)->value())
-    //           : CSSMatrixComponent::Rotate3d(
-    //              angle_->to(CSSPrimitiveValue::UnitType::kDegrees)->value(),
-    //                 x_, y_, z_);
-  }
+  DOMMatrix* AsMatrix() const final;
   CSSFunctionValue* ToCSSValue() const final;
 
   DEFINE_INLINE_VIRTUAL_TRACE() {
     visitor->Trace(angle_);
     CSSTransformComponent::Trace(visitor);
   }
 
  private:
   CSSRotation(double x, double y, double z, CSSNumericValue* angle, bool is2D)
       : CSSTransformComponent(is2D), angle_(angle), x_(x), y_(y), z_(z) {}
 
   Member<CSSNumericValue> angle_;
   double x_;
   double y_;
   double z_;
 };
 
 }  // namespace blink
 
 #endif