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diff --git a/chrome/browser/browser_commands_unittest.cc b/chrome/browser/browser_commands_unittest.cc
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+++ b/chrome/browser/browser_commands_unittest.cc
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+// Copyright (c) 2006-2008 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.
+
+#include "chrome/app/chrome_dll_resource.h" 
+#include "chrome/browser/browser.h"
+#include "chrome/browser/browser_list.h"
+#include "chrome/browser/navigation_controller.h"
+#include "chrome/browser/navigation_entry.h"
+#include "chrome/test/browser_with_test_window_test.h"
+
+typedef BrowserWithTestWindowTest BrowserCommandsTest;
+
+// Tests IDC_SELECT_TAB_0, IDC_SELECT_NEXT_TAB, IDC_SELECT_PREVIOUS_TAB and
+// IDC_SELECT_LAST_TAB.
+TEST_F(BrowserCommandsTest, TabNavigationAccelerators) {
+  // Create three tabs.
+  AddTestingTab(browser());
+  AddTestingTab(browser());
+  AddTestingTab(browser());
+
+  // Select the second tab.
+  browser()->SelectTabContentsAt(1, false);
+
+  // Navigate to the first tab using an accelerator.
+  browser()->ExecuteCommand(IDC_SELECT_TAB_0);
+  ASSERT_EQ(0, browser()->selected_index());
+
+  // Navigate to the second tab using the next accelerators.
+  browser()->ExecuteCommand(IDC_SELECT_NEXT_TAB);
+  ASSERT_EQ(1, browser()->selected_index());
+
+  // Navigate back to the first tab using the previous accelerators.
+  browser()->ExecuteCommand(IDC_SELECT_PREVIOUS_TAB);
+  ASSERT_EQ(0, browser()->selected_index());
+
+  // Navigate to the last tab using the select last accelerator.
+  browser()->ExecuteCommand(IDC_SELECT_LAST_TAB);
+  ASSERT_EQ(2, browser()->selected_index());
+}
+
+// Tests IDC_DUPLICATE_TAB.
+TEST_F(BrowserCommandsTest, DuplicateTab) {
+  GURL url1 = test_url_with_path("1");
+  GURL url2 = test_url_with_path("2");
+  GURL url3 = test_url_with_path("3");
+
+  // Navigate to the three urls, then go back.
+  AddTestingTab(browser());
+  browser()->OpenURL(url1, GURL(), CURRENT_TAB, PageTransition::TYPED);
+  browser()->OpenURL(url2, GURL(), CURRENT_TAB, PageTransition::TYPED);
+  browser()->OpenURL(url3, GURL(), CURRENT_TAB, PageTransition::TYPED);
+
+  size_t initial_window_count = BrowserList::size();
+
+  // Duplicate the tab.
+  browser()->ExecuteCommand(IDC_DUPLICATE_TAB);
+
+  // The duplicated tab should not end up in a new window.
+  int window_count = BrowserList::size();
+  ASSERT_EQ(initial_window_count, window_count);
+
+  // And we should have a newly duplicated tab.
+  ASSERT_EQ(2, browser()->tab_count());
+
+  // Verify the stack of urls.
+  NavigationController* controller =
+      browser()->GetTabContentsAt(1)->controller();
+  ASSERT_EQ(3, controller->GetEntryCount());
+  ASSERT_EQ(2, controller->GetCurrentEntryIndex());
+  ASSERT_TRUE(url1 == controller->GetEntryAtIndex(0)->url());
+  ASSERT_TRUE(url2 == controller->GetEntryAtIndex(1)->url());
+  ASSERT_TRUE(url3 == controller->GetEntryAtIndex(2)->url());
+}