Switch about box to web ui on Windows.

chrome/browser/ui/chrome_pages.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/chrome_pages.h"
 
 #include "base/logging.h"
 #include "base/string_number_conversions.h"
 #include "base/stringprintf.h"
 #include "chrome/browser/download/download_shelf.h"
@@ skipping 140 matching lines @@
   content::RecordAction(UserMetricsAction("Import_ShowDlg"));
   ShowSettingsSubPage(browser, kImportDataSubPage);
 }
 
 void ShowInstantConfirmDialog(Browser* browser) {
   ShowSettingsSubPage(browser, kInstantConfirmPage);
 }
 
 void ShowAboutChrome(Browser* browser) {
   content::RecordAction(UserMetricsAction("AboutChrome"));
-#if !defined(OS_WIN)
   NavigateParams params(
       GetSingletonTabNavigateParams(browser, GURL(kChromeUIUberURL)));
   params.path_behavior = NavigateParams::IGNORE_AND_NAVIGATE;
   ShowSingletonTabOverwritingNTP(browser, params);
-#else
-  // crbug.com/115123.
-  browser->window()->ShowAboutChromeDialog();
-#endif
 }
 
 void ShowSearchEngineSettings(Browser* browser) {
   content::RecordAction(UserMetricsAction("EditSearchEngines"));
   ShowSettingsSubPage(browser, kSearchEnginesSubPage);
 }
 
 void ShowSyncSetup(Browser* browser, SyncPromoUI::Source source) {
   ProfileSyncService* service =
       ProfileSyncServiceFactory::GetInstance()->GetForProfile(
           browser->profile()->GetOriginalProfile());
   LoginUIService* login_service = LoginUIServiceFactory::GetForProfile(
       browser->profile()->GetOriginalProfile());
   if (service->HasSyncSetupCompleted()) {
     ShowSettings(browser);
   } else if (SyncPromoUI::ShouldShowSyncPromo(browser->profile()) &&
              login_service->current_login_ui() == NULL) {
     // There is no currently active login UI, so display a new promo page.
     GURL url(SyncPromoUI::GetSyncPromoURL(GURL(), source));
     NavigateParams params(GetSingletonTabNavigateParams(browser, GURL(url)));
     params.path_behavior = NavigateParams::IGNORE_AND_NAVIGATE;
     ShowSingletonTabOverwritingNTP(browser, params);
   } else {
     LoginUIServiceFactory::GetForProfile(
         browser->profile()->GetOriginalProfile())->ShowLoginUI(browser);
   }
 }
 
 }  // namespace chrome