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

chrome/browser/ui/browser_view_prefs.h

Index: chrome/browser/ui/browser_view_prefs.h
diff --git a/chrome/browser/ui/browser_view_prefs.h b/chrome/browser/ui/browser_view_prefs.h
index de9f15ed88e11928d29ff75d7147ee23b0579e52..44b231c8d9680131e2484525240022ee072a0731 100644
--- a/chrome/browser/ui/browser_view_prefs.h
+++ b/chrome/browser/ui/browser_view_prefs.h
@@ -6,6 +6,7 @@
 #define CHROME_BROWSER_UI_BROWSER_VIEW_PREFS_H_
 
 class PrefRegistrySimple;
+class PrefService;
 
 namespace user_prefs {
 class PrefRegistrySyncable;
@@ -21,6 +22,10 @@ void RegisterBrowserViewLocalPrefs(PrefRegistrySimple* registry);
 void RegisterBrowserViewProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry);
 
+// Converts deprecated int tabstrip layout type into a boolean value indicating
+// stacked layout preference.
+void MigrateBrowserTabStripPrefs(PrefService* pref);
+
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_BROWSER_VIEW_PREFS_H_