Add basic Chrome interaction with the mash shelf.

chrome/browser/ui/ash/chrome_launcher_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_ASH_CHROME_LAUNCHER_PREFS_H_
 #define CHROME_BROWSER_UI_ASH_CHROME_LAUNCHER_PREFS_H_
 
 #include <string>
 
+#include "ash/shelf/shelf_types.h"
+
 namespace base {
 class DictionaryValue;
 }
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
 namespace ash {
 
@@ skipping 10 matching lines @@
 // Values used for prefs::kShelfAlignment.
 extern const char kShelfAlignmentBottom[];
 extern const char kShelfAlignmentLeft[];
 extern const char kShelfAlignmentRight[];
 
 void RegisterChromeLauncherUserPrefs(
     user_prefs::PrefRegistrySyncable* registry);
 
 base::DictionaryValue* CreateAppDict(const std::string& app_id);
 
+ash::ShelfAlignment AlignmentFromPref(const std::string& value);
+const char* AlignmentToPref(ash::ShelfAlignment alignment);
+
+ash::ShelfAutoHideBehavior AutoHideBehaviorFromPref(const std::string& value);
+const char* AutoHideBehaviorToPref(ash::ShelfAutoHideBehavior behavior);
+
 }  // namespace ash
 
 #endif  // CHROME_BROWSER_UI_ASH_CHROME_LAUNCHER_PREFS_H_