Enables stacked tabs for aura-metro

chrome/browser/ui/views/tabs/tab_strip.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/views/tabs/tab_strip.h"
 
 #if defined(OS_WIN)
 #include <windowsx.h>
 #endif
 
 #include <algorithm>
 #include <iterator>
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/metrics/histogram.h"
 #include "base/stl_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/defaults.h"
+#include "chrome/browser/ui/host_desktop.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/view_ids.h"
 #include "chrome/browser/ui/views/tabs/stacked_tab_strip_layout.h"
 #include "chrome/browser/ui/views/tabs/tab.h"
 #include "chrome/browser/ui/views/tabs/tab_drag_controller.h"
 #include "chrome/browser/ui/views/tabs/tab_strip_controller.h"
 #include "chrome/browser/ui/views/tabs/tab_strip_observer.h"
 #include "chrome/browser/ui/views/touch_uma/touch_uma.h"
 #include "content/public/browser/user_metrics.h"
 #include "grit/generated_resources.h"
@@ skipping 2689 matching lines @@
   if (reset_to_shrink_on_exit_)
     AddMessageLoopObserver();
   else
     RemoveMessageLoopObserver();
 }
 
 bool TabStrip::GetAdjustLayout() const {
   if (!adjust_layout_)
     return false;
 
-#if !defined(OS_CHROMEOS)
+#if defined(USE_AURA)
+  return chrome::GetHostDesktopTypeForNativeView(
+      GetWidget()->GetNativeView()) == chrome::HOST_DESKTOP_TYPE_ASH;
+#else
   if (ui::GetDisplayLayout() != ui::LAYOUT_TOUCH)
     return false;
 #endif
 
   return true;
 }