[WebSocket] Make subprotocol and extensions live in WebSocket

Source/modules/websockets/MainThreadWebSocketChannel.h

Index: Source/modules/websockets/MainThreadWebSocketChannel.h
diff --git a/Source/modules/websockets/MainThreadWebSocketChannel.h b/Source/modules/websockets/MainThreadWebSocketChannel.h
index 41348ffc1e78b594d14c35a20df32d6e688f74f1..2e4f68228cf46f61c29daad255081be921d6dcfd 100644
--- a/Source/modules/websockets/MainThreadWebSocketChannel.h
+++ b/Source/modules/websockets/MainThreadWebSocketChannel.h
@@ -71,8 +71,6 @@ public:
 
     // WebSocketChannel functions.
     virtual bool connect(const KURL&, const String& protocol) OVERRIDE;
-    virtual String subprotocol() OVERRIDE;
-    virtual String extensions() OVERRIDE;
     virtual WebSocketChannel::SendResult send(const String& message) OVERRIDE;
     virtual WebSocketChannel::SendResult send(const ArrayBuffer&, unsigned byteOffset, unsigned byteLength) OVERRIDE;
     virtual WebSocketChannel::SendResult send(PassRefPtr<BlobDataHandle>) OVERRIDE;