Fix LayoutObject::paintingLayer() about multicol spanner

third_party/WebKit/Source/core/layout/LayoutObjectTest.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/layout/LayoutObject.h"
 
 #include "core/layout/LayoutTestHelper.h"
 #include "core/layout/LayoutView.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 91 matching lines @@
     LayoutObject* layoutObject = bodyLayoutObject->slowFirstChild()->slowFirstChild();
 
     // Sanity check: Make sure we don't generate anonymous objects.
     EXPECT_EQ(nullptr, bodyLayoutObject->slowFirstChild()->nextSibling());
     EXPECT_EQ(nullptr, layoutObject->slowFirstChild());
     EXPECT_EQ(nullptr, layoutObject->nextSibling());
 
     EXPECT_EQ(layoutObject->containingBlock(), bodyLayoutObject);
 }
 
+TEST_F(LayoutObjectTest, PaintingLayerOfOverflowClipLayerUnderColumnSpanAll)
+{
+    setBodyInnerHTML(
+        "<div id='columns' style='columns: 3'>"
+        "  <div style='column-span: all'>"
+        "    <div id='overflow-clip-layer' style='height: 100px; overflow: hidden'></div>"
+        "  </div>"
+        "</div>");
+
+    LayoutObject* overflowClipObject = getLayoutObjectByElementId("overflow-clip-layer");
+    LayoutBlock* columns = toLayoutBlock(getLayoutObjectByElementId("columns"));
+    EXPECT_EQ(columns->layer(), overflowClipObject->paintingLayer());
+}
+
 } // namespace blink