[WebSocket] Make subprotocol and extensions live in WebSocket

Source/modules/websockets/WebSocketChannel.h

Index: Source/modules/websockets/WebSocketChannel.h
diff --git a/Source/modules/websockets/WebSocketChannel.h b/Source/modules/websockets/WebSocketChannel.h
index 5f9369e4b6e6c5d96eb2d620f6021226c2470c37..3fdc957c283090e841bda4899b94203ede59c326 100644
--- a/Source/modules/websockets/WebSocketChannel.h
+++ b/Source/modules/websockets/WebSocketChannel.h
@@ -81,8 +81,6 @@ public:
     };
 
     virtual bool connect(const KURL&, const String& protocol) = 0;
-    virtual String subprotocol() = 0; // Will be available after didConnect() callback is invoked.
-    virtual String extensions() = 0; // Will be available after didConnect() callback is invoked.
     virtual SendResult send(const String& message) = 0;
     virtual SendResult send(const ArrayBuffer&, unsigned byteOffset, unsigned byteLength) = 0;
     virtual SendResult send(PassRefPtr<BlobDataHandle>) = 0;