Implement chrome.experimental.downloads.onChanged

chrome/test/data/extensions/api_test/downloads/test.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.
 
 // downloads api test
 // browser_tests.exe --gtest_filter=DownloadsApiTest.Downloads
 
 chrome.test.getConfig(function(testConfig) {
   function getURL(path) {
     return "http://localhost:" + testConfig.testServer.port + "/" + path;
@@ skipping 12 matching lines @@
         chrome.test.fail("Failed to throw exception (" +
                          expected_message + ")");
       });
     } catch (exception) {
       chrome.test.assertEq(expected_message, exception.message);
       chrome.test.succeed();
     }
   }
 
   chrome.test.runTests([
+    // TODO(benjhayden): Uncomment after 8060042.
+    // function downloadOnChanged() {
+    //   function myListener(delta) {
+    //     if (delta.state && delta.state.new == 'complete') {
+    //       chrome.experimental.downloads.onChanged.removeListener(myListener);
+    //       chrome.test.succeed();
+    //     }
+    //   }
+    //   chrome.experimental.downloads.onChanged.addListener(myListener);
+    //   chrome.experimental.downloads.download(
+    //     {"url": getURL("slow?0")},
+    //     function(id) {
+    //       chrome.test.assertEq(getNextId(), id);
+    //   });
+    // },
     function downloadFilename() {
       chrome.experimental.downloads.download(
         {"url": getURL("pass"), "filename": "pass"},
         chrome.test.callbackPass(function(id) {
           chrome.test.assertEq(getNextId(), id);
       }));
       // TODO(benjhayden): Test the filename using onChanged.
     },
     function downloadSubDirectoryFilename() {
       chrome.experimental.downloads.download(
@@ skipping 63 matching lines @@
     },
     function downloadInvalidHeader() {
       chrome.experimental.downloads.download(
         {"url": getURL("pass"),
          "headers": [{"name": "Cookie", "value": "fake"}]},
         chrome.test.callbackFail("I'm afraid I can't do that."));
       // TODO(benjhayden): Give a better error message.
     }
   ]);
 });