Make URL filter for web request API mandatory

chrome/test/data/extensions/api_test/webrequest/test_simple.js

 // Copyright (c) 2011 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.
 
 // Constants as functions, not to be called until after runTests.
 function getURLHttpSimpleLoad() {
   return getServerURL('files/extensions/api_test/webrequest/simpleLoad/a.html');
 }
 
 function getURLHttpSimpleLoadRedirect() {
@@ skipping 140 matching lines @@
             responseHeadersExist: true,
             statusLine: "HTTP/1.0 200 OK"
           }
         }
       ],
       [  // event order
         ["onBeforeRequest-1", "onBeforeSendHeaders-1", "onSendHeaders-1",
          "onHeadersReceived-1", "onBeforeRedirect",
          "onBeforeRequest-2", "onBeforeSendHeaders-2", "onSendHeaders-2",
          "onHeadersReceived-2", "onResponseStarted", "onCompleted"] ],
-      {},  // filter
+      {urls: ["<all_urls>"]},  // filter
       ["requestHeaders", "responseHeaders"]);
     navigateAndWait(getURLHttpSimpleLoadRedirect());
   },
 
   // Navigates to a non-existing page.
   function nonExistingLoad() {
     expect(
       [  // events
         { label: "onBeforeRequest",
           event: "onBeforeRequest",
@@ skipping 50 matching lines @@
           }
         },
       ],
       [  // event order
       ["a-onBeforeRequest", "a-onResponseStarted", "a-onCompleted"] ]);
     navigateAndWait(getURLNotVisible(), function() {
       navigateAndWait(getURL("simpleLoad/a.html"));
     });
   },
 ]);