Disabled metro mode launch for Windows 10, until there some clarity on technical details.

chrome/browser/ui/toolbar/wrench_menu_model.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/toolbar/wrench_menu_model.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/command_line.h"
@@ skipping 925 matching lines @@
       content::GpuDataManager::GetInstance()->CanUseGpuBrowserCompositor()) ||
       (base::win::GetVersion() >= base::win::VERSION_WIN8)) {
     if (browser_->host_desktop_type() == chrome::HOST_DESKTOP_TYPE_ASH) {
       // ASH/Metro mode, add the 'Relaunch Chrome in desktop mode'.
       AddSeparator(ui::NORMAL_SEPARATOR);
       AddItemWithStringId(IDC_WIN_DESKTOP_RESTART, IDS_WIN_DESKTOP_RESTART);
     } else {
       // In Windows 8 desktop, add the 'Relaunch Chrome in Windows 8 mode'.
       // In Windows 7 desktop, add the 'Relaunch Chrome in Windows ASH mode'
       AddSeparator(ui::NORMAL_SEPARATOR);
-      if (base::win::GetVersion() >= base::win::VERSION_WIN8)
+      if (base::win::GetVersion() == base::win::VERSION_WIN8 ||
+          base::win::GetVersion() == base::win::VERSION_WIN8_1)
         AddItemWithStringId(IDC_WIN8_METRO_RESTART, IDS_WIN8_METRO_RESTART);
       else
         AddItemWithStringId(IDC_WIN_CHROMEOS_RESTART, IDS_WIN_CHROMEOS_RESTART);
     }
   }
 #endif
 
   bool show_exit_menu = browser_defaults::kShowExitMenuItem;
 #if defined(OS_WIN)
   if (browser_->host_desktop_type() == chrome::HOST_DESKTOP_TYPE_ASH)
@@ skipping 105 matching lines @@
                        ->GetZoomPercent();
   }
   zoom_label_ = l10n_util::GetStringFUTF16(
       IDS_ZOOM_PERCENT, base::IntToString16(zoom_percent));
 }
 
 void WrenchMenuModel::OnZoomLevelChanged(
     const content::HostZoomMap::ZoomLevelChange& change) {
   UpdateZoomControls();
 }