Add WebSocket cookie tests.

net/websockets/websocket_test_util.h

Index: net/websockets/websocket_test_util.h
diff --git a/net/websockets/websocket_test_util.h b/net/websockets/websocket_test_util.h
index 5c7db80eac748fe676394e5b221cf39866bc38ff..2b6ce7787b858a200876837c5d94d289c4abdc6d 100644
--- a/net/websockets/websocket_test_util.h
+++ b/net/websockets/websocket_test_util.h
@@ -62,6 +62,16 @@ extern std::string WebSocketStandardRequest(const std::string& path,
                                             const std::string& origin,
                                             const std::string& extra_headers);
 
+// Generates a standard WebSocket handshake request. The challenge key used is
+// "dGhlIHNhbXBsZSBub25jZQ==". |cookies| must be empty or terminated with
+// "\r\n". Each header in |extra_headers| must be terminated with "\r\n".
+extern std::string WebSocketStandardRequestWithCookies(
+    const std::string& path,
+    const std::string& host,
+    const std::string& origin,
+    const std::string& cookies,
+    const std::string& extra_headers);
+
 // A response with the appropriate accept header to match the above challenge
 // key. Each header in |extra_headers| must be terminated with "\r\n".
 extern std::string WebSocketStandardResponse(const std::string& extra_headers);