Removes --enable-stacked-tab-strip flag (Stacked Tabs)

chrome/browser/ui/tabs/tab_strip_layout_type_prefs.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_TABS_TAB_STRIP_LAYOUT_TYPE_PREFS_H_
 #define CHROME_BROWSER_UI_TABS_TAB_STRIP_LAYOUT_TYPE_PREFS_H_
 
 class PrefRegistrySimple;
+class PrefService;
 
 namespace chrome {
 
-// Register local state preferences specific to the TabStrip.
-void RegisterTabStripLayoutTypePrefs(PrefRegistrySimple* registry);
+class TabStripLayoutTypePrefs {
+ public:
+  // Register local state preferences specific to the TabStrip.
+  static void Register(PrefRegistrySimple* registry);
+
+  // Returns |prefs| setting for whether stacked layout is used.
+  static bool GetStackedLayout(PrefService* prefs);
+
+  // Sets |prefs| setting for whether stacked layout is used as specified by
+  // |stacked_layout| parameter.
+  static void SetStackedLayout(PrefService* prefs, bool stacked_layout);
+};
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_TABS_TAB_STRIP_LAYOUT_TYPE_PREFS_H_