Oilpan: fix build after r201904.

Source/core/editing/EditingUtilitiesTest.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 "config.h"
 #include "core/editing/EditingUtilities.h"
 
 #include "core/editing/EditingTestBase.h"
 
 namespace blink {
@@ skipping 66 matching lines @@
 
     EXPECT_EQ(host, enclosingNodeOfType(Position(one, 0), isEnclosingBlock));
     EXPECT_EQ(three, enclosingNodeOfType(PositionInComposedTree(one, 0), isEnclosingBlock));
 }
 
 TEST_F(EditingUtilitiesTest, isFirstPositionAfterTable)
 {
     const char* bodyContent = "<div contenteditable id=host><table id=table><tr><td>1</td></tr></table><b id=two>22</b></div>";
     const char* shadowContent = "<content select=#two></content><content select=#table></content>";
     setBodyContent(bodyContent);
-    RefPtrWillBeRawPtr<ShadowRoot> shadowRoot = setShadowContent(shadowContent, "host");
+    setShadowContent(shadowContent, "host");
     updateLayoutAndStyleForPainting();
     Node* host = document().getElementById("host");
     Node* table = document().getElementById("table");
 
     EXPECT_EQ(table, isFirstPositionAfterTable(createVisiblePosition(Position::afterNode(table))));
     EXPECT_EQ(table, isFirstPositionAfterTable(createVisiblePosition(PositionInComposedTree::afterNode(table))));
 
     EXPECT_EQ(table, isFirstPositionAfterTable(createVisiblePosition(Position::lastPositionInNode(table))));
     EXPECT_EQ(table, isFirstPositionAfterTable(createVisiblePosition(PositionInComposedTree::lastPositionInNode(table))));
 
@@ skipping 29 matching lines @@
     updateLayoutAndStyleForPainting();
     Node* one = document().getElementById("one");
     Node* two = document().getElementById("two");
     Node* three = document().getElementById("three");
 
     EXPECT_EQ(Position(two->firstChild(), 1), nextVisuallyDistinctCandidate(Position(one, 1)));
     EXPECT_EQ(PositionInComposedTree(three->firstChild(), 1), nextVisuallyDistinctCandidate(PositionInComposedTree(one, 1)));
 }
 
 } // namespace blink