Provide child/frame IDs for WebSocket handshake request

net/websockets/websocket_event_interface.h

Index: net/websockets/websocket_event_interface.h
diff --git a/net/websockets/websocket_event_interface.h b/net/websockets/websocket_event_interface.h
index ac29659aac8bb608edab44014c1045ff90b870d0..db24207f16a1bade64af902b552c4535815efe65 100644
--- a/net/websockets/websocket_event_interface.h
+++ b/net/websockets/websocket_event_interface.h
@@ -22,6 +22,7 @@ namespace net {
 
 class IOBuffer;
 class SSLInfo;
+class URLRequest;
 struct WebSocketHandshakeRequestInfo;
 struct WebSocketHandshakeResponseInfo;
 
@@ -41,6 +42,9 @@ class NET_EXPORT WebSocketEventInterface {
 
   virtual ~WebSocketEventInterface() {}
 
+  // Called when a URLRequest is created for handshaking.
+  virtual void OnCreateURLRequest(URLRequest* request) = 0;
+
   // Called in response to an AddChannelRequest. This means that a response has
   // been received from the remote server.
   virtual ChannelState OnAddChannelResponse(