[4/5 blink] Shows the clients which are controlled by ServiceWorker in DevTools.

Source/devtools/front_end/resources/serviceWorkersView.css

 /*
  * Copyright 2015 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.
  */
 
 .service-workers-view {
     overflow: auto;
 }
 
@@ skipping 218 matching lines @@
 }
 
 .service-workers-error-message {
     font-weight: bold;
 }
 
 .service-workers-info {
     display: flex;
 }
 
+.service-worker-client {
+   display: inline;
+}
+
+.service-worker-client-focus {
+   color: #00e;
+   cursor: pointer;
+   padding-left: 4px;
+   text-decoration: underline;
+}
+
 .service-workers-color-0 {
     background-color: #003366;
 }
 
 .service-workers-color-1 {
     background-color: #663300;
 }
 
 .service-workers-color-2 {
     background-color: #660066;
@@ skipping 19 matching lines @@
     background-color: #996600;
 }
 
 .service-workers-color-8 {
     background-color: #9900CC;
 }
 
 .service-workers-color-9 {
     background-color: #336600;
 }