Switch from chrome://extensions to chrome://settings/extensionSettings.

chrome/browser/ui/browser.cc

 // 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.
 
 #include "chrome/browser/ui/browser.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <shellapi.h>
 #endif  // OS_WIN
@@ skipping 716 matching lines @@
   UMA_HISTOGRAM_ENUMERATION("Extensions.AppTabLaunchType", launch_type, 100);
   int add_type = TabStripModel::ADD_ACTIVE;
   if (launch_type == ExtensionPrefs::LAUNCH_PINNED)
     add_type |= TabStripModel::ADD_PINNED;
 
   // For extensions lacking launch urls, determine a reasonable fallback.
   GURL extension_url = extension->GetFullLaunchURL();
   if (!extension_url.is_valid()) {
     extension_url = extension->options_url();
     if (!extension_url.is_valid())
-      extension_url = GURL(chrome::kChromeUIExtensionsURL);
+      extension_url = GURL(chrome::kChromeUISettingsURL).Resolve(
+          chrome::kExtensionsSubPage);
   }
 
   // TODO(erikkay): START_PAGE doesn't seem like the right transition in all
   // cases.
   browser::NavigateParams params(browser, extension_url,
                                  PageTransition::START_PAGE);
   params.tabstrip_add_types = add_type;
   params.disposition = disposition;
 
   if (disposition == CURRENT_TAB) {
@@ skipping 1313 matching lines @@
     if (shelf->IsShowing())
       shelf->Close();
   }
 #endif
   ShowSingletonTabOverwritingNTP(
       GetSingletonTabNavigateParams(GURL(chrome::kChromeUIDownloadsURL)));
 }
 
 void Browser::ShowExtensionsTab() {
   UserMetrics::RecordAction(UserMetricsAction("ShowExtensions"));
-  ShowSingletonTabOverwritingNTP(
-      GetSingletonTabNavigateParams(GURL(chrome::kChromeUIExtensionsURL)));
+  ShowOptionsTab(chrome::kExtensionsSubPage);
 }
 
 void Browser::ShowAboutConflictsTab() {
   UserMetrics::RecordAction(UserMetricsAction("AboutConflicts"));
   ShowSingletonTab(GURL(chrome::kChromeUIConflictsURL));
 }
 
 void Browser::ShowBrokenPageTab(TabContents* contents) {
   UserMetrics::RecordAction(UserMetricsAction("ReportBug"));
   string16 page_title = contents->GetTitle();
@@ skipping 3105 matching lines @@
       profile()->GetOriginalProfile()->GetProfileSyncService();
   if (service->HasSyncSetupCompleted())
     ShowOptionsTab(chrome::kSyncSetupSubPage);
   else
     service->ShowLoginDialog();
 }
 
 void Browser::ToggleSpeechInput() {
   GetSelectedTabContentsWrapper()->render_view_host()->ToggleSpeechInput();
 }