DevTools: Address empty query parameters being displayed fugly.

third_party/WebKit/Source/devtools/front_end/network/requestHeadersView.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.
  */
 
 .request-headers-view {
     -webkit-user-select: text;
     overflow: auto;
 }
@@ skipping 85 matching lines @@
 }
 
 .request-headers-view .outline-disclosure .header-value {
     display: inline;
     margin-right: 1em;
     white-space: pre-wrap;
     word-break: break-all;
     margin-top: 1px;
 }
 
+.request-headers-view .outline-disclosure .empty-request-header {
+    color: rgba(33%, 33%, 33%, 0.5);
+}
+
 .resource-status-image {
     margin-top: -2px;
     margin-right: 3px;
 }
 
 .request-headers-view .filter-input {
     outline: none !important;
     border: none;
     border-bottom: solid 1px #ccc;
     flex: 0 0 19px;
     padding: 0 4px;
 }