Update perspective paint properties on perspective-origin changes

third_party/WebKit/Source/core/paint/PaintPropertyTreeUpdateTests.cpp

Index: third_party/WebKit/Source/core/paint/PaintPropertyTreeUpdateTests.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintPropertyTreeUpdateTests.cpp b/third_party/WebKit/Source/core/paint/PaintPropertyTreeUpdateTests.cpp
index 726bee4b5afb701d5b63e7099849cc3ce179b80f..dc2641caa86b4ae67396db6e30c161c9c661d23b 100644
--- a/third_party/WebKit/Source/core/paint/PaintPropertyTreeUpdateTests.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintPropertyTreeUpdateTests.cpp
@@ -498,4 +498,34 @@ TEST_P(PaintPropertyTreeUpdateTest,
   EXPECT_EQ(nullptr, properties->effect());
 }
 
+TEST_P(PaintPropertyTreeUpdateTest, PerspectiveOriginUpdatesOnSizeChanges) {
+  setBodyInnerHTML(
+      "<style>"
+      "  body { margin: 0 }"
+      "  #perspective {"
+      "    position: absolute;"
+      "    perspective: 100px;"
+      "    width: 100px;"
+      "    perspective-origin: 50% 50% 0;"
+      "  }"
+      "</style>"
+      "<div id='perspective'>"
+      "  <div id='contents'></div>"
+      "</div>");
+
+  auto* perspective = document().getElementById("perspective")->layoutObject();
+  EXPECT_EQ(TransformationMatrix().applyPerspective(100),
+            perspective->paintProperties()->perspective()->matrix());
+  EXPECT_EQ(FloatPoint3D(50, 0, 0),
+            perspective->paintProperties()->perspective()->origin());
+
+  auto* contents = document().getElementById("contents");
+  contents->setAttribute(HTMLNames::styleAttr, "height: 200px;");
+  document().view()->updateAllLifecyclePhases();
+  EXPECT_EQ(TransformationMatrix().applyPerspective(100),
+            perspective->paintProperties()->perspective()->matrix());
+  EXPECT_EQ(FloatPoint3D(50, 100, 0),
+            perspective->paintProperties()->perspective()->origin());
+}
+
 }  // namespace blink