Unify browser bridge request normalization

internal/browserbridge/bridge.go

@@ -140,16 +140,21 @@ func WriteResponse(w io.Writer, resp Response) error {
 }
 
 func (r Request) Connection() (Connection, error) {
-	conn := Connection{
+	return normalizeConnection(Connection{
 		GRPCAddress: strings.TrimSpace(r.GRPCAddress),
 		BearerToken: strings.TrimSpace(r.BearerToken),
-	}
-	if conn.GRPCAddress == "" {
+	})
+}
+
+func normalizeConnection(conn Connection) (Connection, error) {
+	if strings.TrimSpace(conn.GRPCAddress) == "" {
 		conn.GRPCAddress = grpcaddr.Default(runtime.GOOS)
 	}
-	if conn.BearerToken == "" {
+	if strings.TrimSpace(conn.BearerToken) == "" {
 		return Connection{}, fmt.Errorf("browser bridge bearer token is required")
 	}
+	conn.GRPCAddress = strings.TrimSpace(conn.GRPCAddress)
+	conn.BearerToken = strings.TrimSpace(conn.BearerToken)
 	return conn, nil
 }