Oilpan: fix build after r197804.

Source/core/dom/PositionTest.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/dom/Position.h"
 
 #include "core/editing/EditingTestBase.h"
 
 namespace blink {
@@ skipping 64 matching lines @@
     EXPECT_EQ(t1, PositionInComposedTree::afterNode(host).nodeAsRangeLastNode());
 }
 
 TEST_F(PositionTest, ToPositionInComposedTreeWithActiveInsertionPoint)
 {
     const char* bodyContent = "<p id='host'>00<b id='one'>11</b>22</p>";
     const char* shadowContent = "<a id='a'><content select=#one id='content'></content><content></content></a>";
     setBodyContent(bodyContent);
     RefPtrWillBeRawPtr<ShadowRoot> shadowRoot = setShadowContent(shadowContent);
     RefPtrWillBeRawPtr<Element> anchor = shadowRoot->getElementById("a");
-    RefPtrWillBeRawPtr<Element> insertionPoint = shadowRoot->getElementById("content");
 
     EXPECT_EQ(positionInComposedTree(*anchor, 0), toPositionInComposedTree(positionInDOMTree(*anchor, 0)));
     EXPECT_EQ(positionInComposedTree(*anchor, 1), toPositionInComposedTree(positionInDOMTree(*anchor, 1)));
     EXPECT_EQ(PositionInComposedTree(anchor, PositionInComposedTree::PositionIsAfterChildren), toPositionInComposedTree(positionInDOMTree(*anchor, 2)));
 }
 
 TEST_F(PositionTest, ToPositionInComposedTreeWithInactiveInsertionPoint)
 {
     const char* bodyContent = "<p id='p'><content></content></p>";
     setBodyContent(bodyContent);
     RefPtrWillBeRawPtr<Element> anchor = document().getElementById("p");
 
     EXPECT_EQ(positionInComposedTree(*anchor, 0), toPositionInComposedTree(positionInDOMTree(*anchor, 0)));
     EXPECT_EQ(PositionInComposedTree(anchor, PositionInComposedTree::PositionIsAfterChildren), toPositionInComposedTree(positionInDOMTree(*anchor, 1)));
 }
 
 } // namespace blink