Add net::HttpServer::Delegate::OnConnect() function and set ChromeDriver buffer sizes to 100 MB

net/server/http_server.h

Index: net/server/http_server.h
diff --git a/net/server/http_server.h b/net/server/http_server.h
index 2ae698b98c5329424e31b2b2bfab616fad85c3ac..47214ab158ec639436894790579d19ced2bb84c7 100644
--- a/net/server/http_server.h
+++ b/net/server/http_server.h
@@ -30,6 +30,7 @@ class HttpServer {
   // destroy the HttpServer in any of these callbacks.
   class Delegate {
    public:
+    virtual void OnConnect(int connection_id) = 0;
     virtual void OnHttpRequest(int connection_id,
                                const HttpServerRequestInfo& info) = 0;
     virtual void OnWebSocketRequest(int connection_id,