[DevTools] Implementation of resource requests blocked by specific urls.

Source/devtools/front_end/network/networkPanel.css

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2009 Anthony Ricaud <rik@webkit.org>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 211 matching lines @@
 .request-view.html iframe {
     width: 100%;
     height: 100%;
     position: absolute;
 }
 
 .network-film-strip {
     border-bottom: solid 1px #cdcdcd;
     flex: none !important;
 }
+
+.blocked-urls-bar {
+    background-color: #f3f3f3;
+    flex: none;
+    border-bottom: 1px solid #dadada;
+    flex-wrap: wrap;
+    max-height: 127px;
+    overflow-y: auto;
+    overflow-x: hidden;
+}
+
+.blocked-urls-bar .blocked-url-container {
+    display: inline-flex;
+    padding: 2px;
+    margin: 2px;
+    background-color: #dadada;
+}
+
+.blocked-urls-bar .blocked-url-text {
+    max-width: 140px;
+    margin-right: 5px;
+    overflow: hidden;
+    flex: none;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}
+
+.blocked-urls-bar .blocked-urls-empty {
+    text-overflow: ellipsis;
+    white-space: nowrap;
+    overflow: hidden;
+    height: 24px;
+    display: flex;
+    align-items: center;
+    padding: 5px;
+}