Allow showing pending URL for new tab navigations, but only if safe.

chrome/browser/ui/browser_navigator_browsertest.cc

 // 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.
 
 #include "chrome/browser/ui/browser_navigator_browsertest.h"
 
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/prefs/incognito_mode_prefs.h"
@@ skipping 167 matching lines @@
     default:
       break;
   }
 }
 
 
 namespace {
 
 // This test verifies that when a navigation occurs within a tab, the tab count
 // of the Browser remains the same and the current tab bears the loaded URL.
+// Note that network URLs are not actually loaded in tests, so this also tests
+// that error pages leave the intended URL in the address bar.
 IN_PROC_BROWSER_TEST_F(BrowserNavigatorTest, Disposition_CurrentTab) {
   ui_test_utils::NavigateToURL(browser(), GetGoogleURL());
   EXPECT_EQ(GetGoogleURL(),
             browser()->tab_strip_model()->GetActiveWebContents()->GetURL());
   // We should have one window with one tab.
   EXPECT_EQ(1u, chrome::GetTotalBrowserCount());
   EXPECT_EQ(1, browser()->tab_strip_model()->count());
 }
 
 // This test verifies that a singleton tab is refocused if one is already opened
@@ skipping 1101 matching lines @@
   ui_test_utils::NavigateToURL(&viewsource_params);
 
   chrome::NavigateParams singleton_params(browser(),
                                           GURL(chrome::kChromeUIVersionURL),
                                           content::PAGE_TRANSITION_LINK);
   singleton_params.disposition = SINGLETON_TAB;
   EXPECT_EQ(-1, chrome::GetIndexOfSingletonTab(&singleton_params));
 }
 
 } // namespace