[Devtools] Allow User-Agent header override for Websockets

net/websockets/websocket_stream.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_WEBSOCKETS_WEBSOCKET_STREAM_H_
 #define NET_WEBSOCKETS_WEBSOCKET_STREAM_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 90 matching lines @@
   // the returned WebSocketStreamRequest object will cancel the connection, in
   // which case the |connect_delegate| object that the caller passed will be
   // deleted without any of its methods being called. Unless cancellation is
   // required, the caller should keep the WebSocketStreamRequest object alive
   // until connect_delegate->OnSuccess() or OnFailure() have been called, then
   // it is safe to delete.
   static std::unique_ptr<WebSocketStreamRequest> CreateAndConnectStream(
       const GURL& socket_url,
       const std::vector<std::string>& requested_subprotocols,
       const url::Origin& origin,
+      const std::string& additional_headers,
       URLRequestContext* url_request_context,
       const BoundNetLog& net_log,
       std::unique_ptr<ConnectDelegate> connect_delegate);
 
   // Derived classes must make sure Close() is called when the stream is not
   // closed on destruction.
   virtual ~WebSocketStream();
 
   // Reads WebSocket frame data. This operation finishes when new frame data
   // becomes available.
@@ skipping 95 matching lines @@
 
 // Alternate version of WebSocketStream::CreateAndConnectStream() for testing
 // use only. The differences are the use of a |create_helper| argument in place
 // of |requested_subprotocols| and taking |timer| as the handshake timeout
 // timer. Implemented in websocket_stream.cc.
 NET_EXPORT_PRIVATE std::unique_ptr<WebSocketStreamRequest>
 CreateAndConnectStreamForTesting(
     const GURL& socket_url,
     std::unique_ptr<WebSocketHandshakeStreamCreateHelper> create_helper,
     const url::Origin& origin,
+    const std::string& additional_headers,
     URLRequestContext* url_request_context,
     const BoundNetLog& net_log,
     std::unique_ptr<WebSocketStream::ConnectDelegate> connect_delegate,
     std::unique_ptr<base::Timer> timer);
 
 }  // namespace net
 
 #endif  // NET_WEBSOCKETS_WEBSOCKET_STREAM_H_