Oilpan: build fix followup to r170842.

R=
BUG=340522
NOTRY=true

Review URL: https://codereview.chromium.org/225783002

git-svn-id: svn://svn.chromium.org/blink/trunk@170857 bbb929c8-8fbe-4397-9dbb-9b2b20218538
diff --git a/Source/web/tests/WebInputEventFactoryTestGtk.cpp b/Source/web/tests/WebInputEventFactoryTestGtk.cpp
index 4a499d2..b14902e 100644
--- a/Source/web/tests/WebInputEventFactoryTestGtk.cpp
+++ b/Source/web/tests/WebInputEventFactoryTestGtk.cpp
@@ -193,7 +193,7 @@
 
     // Round-trip through the WebCore KeyboardEvent class.
     blink::PlatformKeyboardEventBuilder platformBuilder(webEvent);
-    RefPtr<WebCore::KeyboardEvent> keypress = WebCore::KeyboardEvent::create(platformBuilder, 0);
+    RefPtrWillBeRawPtr<WebCore::KeyboardEvent> keypress = WebCore::KeyboardEvent::create(platformBuilder, 0);
     EXPECT_TRUE(keypress->location() == WebCore::KeyboardEvent::DOM_KEY_LOCATION_NUMPAD);
 
     blink::WebKeyboardEventBuilder builder(*keypress);