Oilpan: fix build after r201904.

TBR=oilpan-reviews,yosin
BUG=513568
NOTRY=true

Review URL: https://codereview.chromium.org/1303993005

git-svn-id: svn://svn.chromium.org/blink/trunk@201907 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/core/editing/EditingUtilitiesTest.cpp

@@ -84,7 +84,7 @@ 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");