Reuse existing paint property node is possible

third_party/WebKit/Source/platform/graphics/paint/PropertyTreeStateTest.cpp

 // 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.
 
 #include "platform/graphics/paint/PropertyTreeState.h"
 
 #include "platform/geometry/LayoutRect.h"
 #include "platform/graphics/paint/ClipPaintPropertyNode.h"
 #include "platform/graphics/paint/EffectPaintPropertyNode.h"
 #include "platform/graphics/paint/TransformPaintPropertyNode.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
 class PropertyTreeStateTest : public ::testing::Test {
 public:
     RefPtr<TransformPaintPropertyNode> rootTransformNode;
     RefPtr<ClipPaintPropertyNode> rootClipNode;
     RefPtr<EffectPaintPropertyNode> rootEffectNode;
 
     PropertyTreeState rootPropertyTreeState()
     {
         PropertyTreeState state(rootTransformNode.get(), rootClipNode.get(), rootEffectNode.get());
         return state;
     }
 
 private:
     void SetUp() override
     {
-        rootTransformNode = TransformPaintPropertyNode::create(TransformationMatrix(), FloatPoint3D(), nullptr);
-        rootClipNode = ClipPaintPropertyNode::create(rootTransformNode, FloatRoundedRect(LayoutRect::infiniteIntRect()), nullptr);
-        rootEffectNode = EffectPaintPropertyNode::create(1.0, nullptr);
+        rootTransformNode = TransformPaintPropertyNode::create(nullptr, TransformationMatrix(), FloatPoint3D());
+        rootClipNode = ClipPaintPropertyNode::create(nullptr, rootTransformNode, FloatRoundedRect(LayoutRect::infiniteIntRect()));
+        rootEffectNode = EffectPaintPropertyNode::create(nullptr, 1.0);
     }
 };
 
 TEST_F(PropertyTreeStateTest, LeastCommonAncestor)
 {
     TransformationMatrix matrix;
-    RefPtr<TransformPaintPropertyNode> child1 = TransformPaintPropertyNode::create(matrix, FloatPoint3D(), rootPropertyTreeState().transform);
-    RefPtr<TransformPaintPropertyNode> child2 = TransformPaintPropertyNode::create(matrix, FloatPoint3D(), rootPropertyTreeState().transform);
+    RefPtr<TransformPaintPropertyNode> child1 = TransformPaintPropertyNode::create(rootPropertyTreeState().transform, matrix, FloatPoint3D());
+    RefPtr<TransformPaintPropertyNode> child2 = TransformPaintPropertyNode::create(rootPropertyTreeState().transform, matrix, FloatPoint3D());
 
-    RefPtr<TransformPaintPropertyNode> childOfChild1 = TransformPaintPropertyNode::create(matrix, FloatPoint3D(), child1);
-    RefPtr<TransformPaintPropertyNode> childOfChild2 = TransformPaintPropertyNode::create(matrix, FloatPoint3D(), child2);
+    RefPtr<TransformPaintPropertyNode> childOfChild1 = TransformPaintPropertyNode::create(child1, matrix, FloatPoint3D());
+    RefPtr<TransformPaintPropertyNode> childOfChild2 = TransformPaintPropertyNode::create(child2, matrix, FloatPoint3D());
 
     EXPECT_EQ(rootPropertyTreeState().transform, propertyTreeNearestCommonAncestor<TransformPaintPropertyNode>(childOfChild1.get(), childOfChild2.get()));
     EXPECT_EQ(rootPropertyTreeState().transform, propertyTreeNearestCommonAncestor<TransformPaintPropertyNode>(childOfChild1.get(), child2.get()));
     EXPECT_EQ(rootPropertyTreeState().transform, propertyTreeNearestCommonAncestor<TransformPaintPropertyNode>(childOfChild1.get(), rootPropertyTreeState().transform.get()));
     EXPECT_EQ(child1, propertyTreeNearestCommonAncestor<TransformPaintPropertyNode>(childOfChild1.get(), child1.get()));
 
     EXPECT_EQ(rootPropertyTreeState().transform, propertyTreeNearestCommonAncestor<TransformPaintPropertyNode>(childOfChild2.get(), childOfChild1.get()));
     EXPECT_EQ(rootPropertyTreeState().transform, propertyTreeNearestCommonAncestor<TransformPaintPropertyNode>(childOfChild2.get(), child1.get()));
     EXPECT_EQ(rootPropertyTreeState().transform, propertyTreeNearestCommonAncestor<TransformPaintPropertyNode>(childOfChild2.get(), rootPropertyTreeState().transform.get()));
     EXPECT_EQ(child2, propertyTreeNearestCommonAncestor<TransformPaintPropertyNode>(childOfChild2.get(), child2.get()));
 
     EXPECT_EQ(rootPropertyTreeState().transform, propertyTreeNearestCommonAncestor<TransformPaintPropertyNode>(child1.get(), child2.get()));
 }
 
 } // namespace blink