[DevTools] Enable user select / text copy in ServiceWorkersView.

third_party/WebKit/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;
 }
 
 .service-workers-settings {
     border-bottom: 1px solid #e1e1e1;
     min-height: 26px;
     overflow: hidden;
     padding: 5px;
     white-space: nowrap;
 }
 
 .service-workers-root {
     margin: 0;
     padding: 5px;
+    -webkit-user-select: text;
 }
 
 .service-workers-root ol {
     list-style-type: none;
     padding-left: 12px;
 }
 
 .service-workers-origin {
     padding: 5px;
 }
@@ skipping 260 matching lines @@
     background-color: #996600;
 }
 
 .service-workers-color-8 {
     background-color: #9900CC;
 }
 
 .service-workers-color-9 {
     background-color: #336600;
 }