Oilpan: fix WebSockets unit tests after r178758.

Source/modules/websockets/NewWebSocketChannelImplTest.cpp

Index: Source/modules/websockets/NewWebSocketChannelImplTest.cpp
diff --git a/Source/modules/websockets/NewWebSocketChannelImplTest.cpp b/Source/modules/websockets/NewWebSocketChannelImplTest.cpp
index 89dfc728a092f649ecbf72380c63209dbf6d0184..f39cbb76b28f6edb9368ff8b2009f6313d097823 100644
--- a/Source/modules/websockets/NewWebSocketChannelImplTest.cpp
+++ b/Source/modules/websockets/NewWebSocketChannelImplTest.cpp
@@ -93,7 +93,12 @@ public:
         ON_CALL(*channelClient(), didConsumeBufferedAmount(_)).WillByDefault(Invoke(this, &NewWebSocketChannelImplTest::didConsumeBufferedAmount));
     }
 
-    ~NewWebSocketChannelImplTest() { }
+    ~NewWebSocketChannelImplTest()
+    {
+#if ENABLE(OILPAN)
+        channel()->disconnect();
+#endif
+    }
 
     MockWebSocketChannelClient* channelClient()
     {