[Devtools] Change logic of DataGrid's padding-left for grouping

third_party/WebKit/Source/devtools/front_end/network/networkLogView.css

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 53 matching lines @@
 .network-log-grid .network-navigation-row.odd {
     background: #def;
 }
 
 .network-log-grid.data-grid td {
     height: 41px;
     border-left: 1px solid #e1e1e1;
     vertical-align: middle;
 }
 
+.network-log-grid.data-grid tr:not(.parent) td.disclosure::before {
+    content: none;
+}
+
 .network-log-grid.data-grid .corner {
     display: none;
 }
 
 .network-log-grid.data-grid.small td {
     height: 21px;
 }
 
 .network-waterfall-header, .network-log-grid.data-grid th {
     border-bottom: 1px solid rgb(205, 205, 205);
@@ skipping 289 matching lines @@
     right: 0;
     bottom: 1px;
     display: flex;
     align-items: center;
 }
 
 .network-waterfall-header .sort-order-icon {
     align-items: center;
     margin-right: 4px;
 }