Generalize support for per-display shelf prefs.

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"
 
+class Profile;

[oshima, 2016/04/14 19:26:17]

can we instead use PrefSerivce?

[msw, 2016/04/14 20:39:26]

Done.

+
 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);
+// Get or set the shelf auto hide behavior preference for a root window.
+ShelfAutoHideBehavior GetShelfAutoHideBehaviorPref(Profile* profile,
+                                                   int64_t display_id);
+void SetShelfAutoHideBehaviorPref(Profile* profile,
+                                  int64_t display_id,
+                                  ShelfAutoHideBehavior behavior);
 
-ash::ShelfAutoHideBehavior AutoHideBehaviorFromPref(const std::string& value);
-const char* AutoHideBehaviorToPref(ash::ShelfAutoHideBehavior behavior);
+// Get or set the shelf alignment preference for a root window.
+ShelfAlignment GetShelfAlignmentPref(Profile* profile, int64_t display_id);
+void SetShelfAlignmentPref(Profile* profile,
+                           int64_t display_id,
+                           ShelfAlignment alignment);
 
 }  // namespace ash
 
 #endif  // CHROME_BROWSER_UI_ASH_CHROME_LAUNCHER_PREFS_H_