src/third_party/devtools/front_end/network/eventSourceMessagesView.css

/*
 * Copyright (c) 2014 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.
 */

.event-source-messages-view .data-grid {
    flex: auto;
    border: none;
}