Fix leak PaintLayerReflectionInfo

third_party/WebKit/Source/core/paint/PaintLayerTest.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 "core/paint/PaintLayer.h"
+
+#include "core/layout/LayoutReplica.h"
+#include "core/layout/LayoutTestHelper.h"
+
+namespace blink {
+
+class PaintLayerTest : public RenderingTest {
+};
+
+TEST_F(PaintLayerTest, ReflectionLeak)
+{
+    setBodyInnerHTML("<div id='div' style='-webkit-box-reflect: above'>test</div>");
+    HTMLElement* div = toHTMLElement(document().getElementById(AtomicString("div")));
+    PaintLayerReflectionInfo* reflectionInfo = div->layoutBoxModelObject()->layer()->reflectionInfo();
+    ASSERT_TRUE(reflectionInfo);
+    LayoutReplica* replica = reflectionInfo->reflection();
+    ASSERT_TRUE(replica);
+
+    div->setAttribute(HTMLNames::styleAttr, "-webkit-box-reflect: below");
+    document().view()->updateAllLifecyclePhases();
+
+    PaintLayerReflectionInfo* newReflectionInfo = div->layoutBoxModelObject()->layer()->reflectionInfo();
+    ASSERT_TRUE(newReflectionInfo);
+    EXPECT_NE(reflectionInfo, newReflectionInfo);
+    LayoutReplica* newReplica = newReflectionInfo->reflection();
+    ASSERT_TRUE(newReplica);
+    EXPECT_NE(replica, newReplica);
+
+    // LeakDetector should report no leaks of LayoutReplica or PaintLayer.
+}
+
+} // namespace blink