[SPv2] Fix property node invalidation for CSS masks

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

 // Copyright 2015 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 "core/paint/PaintPropertyTreeBuilderTest.h"
 
 #include "core/html/HTMLIFrameElement.h"
 #include "core/layout/LayoutTreeAsText.h"
 #include "core/paint/ObjectPaintProperties.h"
 #include "core/paint/PaintPropertyTreePrinter.h"
@@ skipping 3288 matching lines @@
   EXPECT_EQ(SkBlendMode::kDstIn, properties->mask()->blendMode());
   EXPECT_EQ(outputClip, properties->mask()->outputClip());
 
   const ObjectPaintProperties* properties2 =
       paintPropertiesForElement("overflowing");
   EXPECT_EQ(outputClip, properties2->localBorderBoxProperties()->clip());
   EXPECT_EQ(properties->effect(),
             properties2->localBorderBoxProperties()->effect());
 }
 
+TEST_P(PaintPropertyTreeBuilderTest, MaskClipNodeInvalidation) {
+  // This test verifies the clip node generated for mask's implicit clip
+  // is correctly invalidated when a box resizes.
+  setBodyInnerHTML(
+      "<style>"
+      "#mask {"
+      "  width: 100px;"
+      "  height:100px;"
+      "  -webkit-mask:linear-gradient(red,red);"
+      "}"
+      "</style>"
+      "<div id='mask'>"
+      "  <div style='width:500px; height:500px; background:green;'></div>"
+      "</div>");
+  const ObjectPaintProperties* properties = paintPropertiesForElement("mask");
+  const ClipPaintPropertyNode* maskClip = properties->maskClip();
+  EXPECT_EQ(FloatRoundedRect(8, 8, 100, 100), maskClip->clipRect());
+
+  Element* mask = document().getElementById("mask");
+  mask->setAttribute(HTMLNames::styleAttr, "height: 200px");
+  document().view()->updateAllLifecyclePhases();
+
+  ASSERT_EQ(properties, paintPropertiesForElement("mask"));
+  ASSERT_EQ(maskClip, properties->maskClip());
+  EXPECT_EQ(FloatRoundedRect(8, 8, 100, 200), maskClip->clipRect());
+}
+
 }  // namespace blink