DevTools: WebSocketFrameView - Add frames display control toolbar

third_party/WebKit/Source/devtools/front_end/network/webSocketFrameView.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.
  */
 
 .websocket-frame-view {
     -webkit-user-select: text;
 }
 
@@ skipping 25 matching lines @@
 
 .websocket-frame-view-row-opcode {
     background-color: rgb(255, 255, 232);
     color: rgb(170, 111, 71);
 }
 
 .websocket-frame-view-row-error {
     background-color: rgb(255, 237, 237);
     color: rgb(182, 0, 0);
 }
+
+.websocket-frame-view .toolbar {
+    border-bottom: 1px solid #dadada;
+}