chrome.tabs.onUpdated doesn't called with 'loading' twice.

chrome/test/data/extensions/api_test/tabs/on_updated/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.
 
 var expectedEventData;
 var capturedEventData;
 var shouldIgnore;
 
 function expect(data, ignoreFunc) {
   expectedEventData = data;
@@ skipping 101 matching lines @@
   },
 
   function faviconLoaded() {
     expect([
       { status: 'loading', url: getURL('favicon/a.html') },
       { status: 'complete' },
       { favIconUrl: getURL('favicon/favicon.ico') },
     ]);
 
     chrome.tabs.create({ url: getURL('favicon/a.html') });
-  }
+  },
+
+  function historyReplaceState() {
+    expect([
+      { status: 'loading', url: getURL('historyReplaceState/a.html') },
+      { status: 'complete' },
+      { status: 'loading' },
+      { status: 'complete' },
+    ]);
+
+    chrome.tabs.create({ url: getURL('historyReplaceState/a.html') });
+  },
+
+  function historyReplaceStateUpdateUrl() {
+    // url status is updated. Because history.replaceState updates url.
+    expect([
+      { status: 'loading', url: getURL('historyReplaceStateUpdateUrl/a.html') },
+      { status: 'complete' },
+      { status: 'loading',
+        url: getURL('historyReplaceStateUpdateUrl/a.html#a') },
+      { status: 'complete' },
+    ]);
+
+    chrome.tabs.create({ url: getURL('historyReplaceStateUpdateUrl/a.html') });
+  },
+
+  function historyPushState() {
+    // - a.html starts loading and complete.
+    // - historyPushState doesn't updates current url.
+    expect([
+      { status: 'loading', url: getURL('historyPushState/a.html') },
+      { status: 'complete' },
+      { status: 'loading' },
+      { status: 'complete' },
+    ]);
+
+    chrome.tabs.create({ url: getURL('historyPushState/a.html') });
+  },
+
+  function historyPushStateUpdateUrl() {
+    // - a.html starts loading and complete.
+    // - historyPushState updates current url. so that 'loading' and 'complete'
+    // are fired with updated url.
+    expect([
+      { status: 'loading', url: getURL('historyPushStateUpdateUrl/a.html') },
+      { status: 'complete' },
+      { status: 'loading', url: getURL('historyPushStateUpdateUrl/a.html#a') },
+      { status: 'complete' },
+    ]);
+
+    chrome.tabs.create({ url: getURL('historyPushStateUpdateUrl/a.html') });
+  },
+
+  function locationReplace() {
+    // location.replace("#foo") updates current url. so that 'loading' and
+    // 'complete' are fired with updated url.
+    expect([
+      { status: 'loading', url: getURL('locationReplace/a.html') },
+      { status: 'complete' },
+      { status: 'loading', url: getURL('locationReplace/a.html#foo') },
+      { status: 'complete' },
+    ]);
+
+    chrome.tabs.create({ url: getURL('locationReplace/a.html') });
+  },
 ]);