[Devtools] Allow User-Agent header override for Websockets

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 becaba8d7ee938ba79e9e081947c989297a80c2c..6944cba589d4e484e3651dfa9cf227401010e7bb 100644
--- a/net/websockets/websocket_test_util.h
+++ b/net/websockets/websocket_test_util.h
@@ -45,10 +45,12 @@ class LinearCongruentialGenerator {
 // Generates a standard WebSocket handshake request. The challenge key used is
 // "dGhlIHNhbXBsZSBub25jZQ==". Each header in |extra_headers| must be terminated
 // with "\r\n".
-std::string WebSocketStandardRequest(const std::string& path,
-                                     const std::string& host,
-                                     const url::Origin& origin,
-                                     const std::string& extra_headers);
+std::string WebSocketStandardRequest(
+    const std::string& path,
+    const std::string& host,
+    const url::Origin& origin,
+    const std::string& send_additional_request_headers,
+    const std::string& extra_headers);
 
 // Generates a standard WebSocket handshake request. The challenge key used is
 // "dGhlIHNhbXBsZSBub25jZQ==". |cookies| must be empty or terminated with
@@ -58,6 +60,7 @@ std::string WebSocketStandardRequestWithCookies(
     const std::string& host,
     const url::Origin& origin,
     const std::string& cookies,
+    const std::string& send_additional_request_headers,
     const std::string& extra_headers);
 
 // A response with the appropriate accept header to match the above challenge