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

Source/devtools/front_end/network/NetworkLogView.js

 /*
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2008, 2009 Anthony Ricaud <rik@webkit.org>
  * Copyright (C) 2011 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 1271 matching lines @@
                 contextMenu.appendItem(WebInspector.UIString.capitalize("Copy ^response ^headers"), this._copyResponseHeaders.bind(this, request));
             if (request.finished)
                 contextMenu.appendItem(WebInspector.UIString.capitalize("Copy ^response"), this._copyResponse.bind(this, request));
 
             if (WebInspector.isWin()) {
                 contextMenu.appendItem(WebInspector.UIString("Copy as cURL (cmd)"), this._copyCurlCommand.bind(this, request, "win"));
                 contextMenu.appendItem(WebInspector.UIString("Copy as cURL (bash)"), this._copyCurlCommand.bind(this, request, "unix"));
             } else {
                 contextMenu.appendItem(WebInspector.UIString("Copy as cURL"), this._copyCurlCommand.bind(this, request, "unix"));
             }
+
+            function toggleRequestURLBlocked()
+            {
+                WebInspector.multitargetNetworkManager.toggleURLBlocked(request.url);
+            }
+
+            var blocked = WebInspector.multitargetNetworkManager.blockedURLs().has(request.url);
+            contextMenu.appendSeparator();
+            contextMenu.appendItem(blocked ? WebInspector.UIString.capitalize("Unblock ^request URL") : WebInspector.UIString.capitalize("Block ^request URL"), toggleRequestURLBlocked);
         }
         contextMenu.appendItem(WebInspector.UIString.capitalize("Copy ^all as HAR"), this._copyAll.bind(this));
 
         contextMenu.appendSeparator();
         contextMenu.appendItem(WebInspector.UIString.capitalize("Save as HAR with ^content"), this._exportAll.bind(this));
 
         contextMenu.appendSeparator();
         contextMenu.appendItem(WebInspector.UIString.capitalize("Clear ^browser ^cache"), this._clearBrowserCache.bind(this));
         contextMenu.appendItem(WebInspector.UIString.capitalize("Clear ^browser ^cookies"), this._clearBrowserCookies.bind(this));
 
@@ skipping 759 matching lines @@
         return false;
     return true;
 }
 
 WebInspector.NetworkLogView.EventTypes = {
     RequestSelected: "RequestSelected",
     SearchCountUpdated: "SearchCountUpdated",
     SearchIndexUpdated: "SearchIndexUpdated",
     UpdateRequest: "UpdateRequest"
 };