Implemented proper support for checking schemes and requested resource types.

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

 // Copyright (c) 2012 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.
 
 var onRequest = chrome.experimental.webRequest.onRequest;
 var RequestMatcher = chrome.experimental.webRequest.RequestMatcher;
 var CancelRequest = chrome.experimental.webRequest.CancelRequest;
 var RedirectRequest = chrome.experimental.webRequest.RedirectRequest;
 
 runTests([
   function testCancelRequest() {
     ignoreUnexpected = true;
     expect(
       [
         { label: "onErrorOccurred",
           event: "onErrorOccurred",
           details: {
             url: getURL("simpleLoad/a.html"),
             fromCache: false,
             error: "net::ERR_BLOCKED_BY_CLIENT"
           }
         },
       ],
       [ ["onCompleted"] ]);
 
     onRequest.addRules(
-      [ {'conditions': [new RequestMatcher({'path_suffix': ".html"})],
+      [ {'conditions': [
+           new RequestMatcher({'path_suffix': ".html",
+                               'resourceType': ["main_frame"],
+                               'schemes': ["chrome-extension"]})],
          'actions': [new CancelRequest()]}
       ],
       function() {navigateAndWait(getURL("simpleLoad/a.html"));}
     );
   },
 
   function testRedirectRequest() {
     ignoreUnexpected = true;
     expect(
       [
@@ skipping 37 matching lines @@
          "onCompleted"] ]);
 
     onRequest.addRules(
       [ {'conditions': [new RequestMatcher({'path_suffix': ".html"})],
          'actions': [
              new RedirectRequest({'redirectUrl': getURL("simpleLoad/a.html")})]}
       ],
       function() {navigateAndWait(getURL("complexLoad/a.html"));}
     );
   },
-  ]);
+  ]);