arc: Support pinned apps across Arc-enabled and Arc-disabled platforms.

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 <memory>
 #include <string>
 #include <vector>
@@ skipping 12 matching lines @@
 
 namespace syncable_prefs {
 class PrefServiceSyncable;
 }
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
 namespace ash {
+namespace launcher {
 
 // Path within the dictionary entries in the prefs::kPinnedLauncherApps list
 // specifying the extension ID of the app to be pinned by that entry.
 extern const char kPinnedAppsPrefAppIDPath[];
 
 extern const char kPinnedAppsPrefPinnedByPolicy[];
 
 // Value used as a placeholder in the list of pinned applications.
 // This is NOT a valid extension identifier so pre-M31 versions ignore it.
 extern const char kPinnedAppsPlaceholder[];
@@ skipping 21 matching lines @@
 
 // Get or set the shelf alignment preference for a particular display.
 ShelfAlignment GetShelfAlignmentPref(PrefService* prefs, int64_t display_id);
 void SetShelfAlignmentPref(PrefService* prefs,
                            int64_t display_id,
                            ShelfAlignment alignment);
 
 // Get the list of pinned apps from preferences.
 std::vector<std::string> GetPinnedAppsFromPrefs(
     const PrefService* prefs,
-    const LauncherControllerHelper* helper);
+    LauncherControllerHelper* helper);
+
+// Removes information about pin position from sync model for the app.
+void RemovePinPosition(Profile* profile, const std::string& app_id);
+
+// Updates information about pin position in sync model for the app |app_id|.
+// |app_id_before| optionally specifies an app that exists right before the
+// target app. |app_id_after| optionally specifies an app that exists right
+// after the target app.
+void SetPinPosition(Profile* profile,
+                    const std::string& app_id,
+                    const std::string& app_id_before,
+                    const std::string& app_id_after);
 
 // Used to propagate remote preferences to local during the first run.
 class ChromeLauncherPrefsObserver
     : public syncable_prefs::PrefServiceSyncableObserver {
  public:
   // Creates and returns an instance of ChromeLauncherPrefsObserver if the
   // profile prefs do not contain all the necessary local settings for the
   // shelf. If the local settings are present, returns null.
   static std::unique_ptr<ChromeLauncherPrefsObserver> CreateIfNecessary(
       Profile* profile);
 
   ~ChromeLauncherPrefsObserver() override;
 
  private:
   explicit ChromeLauncherPrefsObserver(
       syncable_prefs::PrefServiceSyncable* prefs);
 
   // syncable_prefs::PrefServiceSyncableObserver:
   void OnIsSyncingChanged() override;
 
   // Profile prefs. Not owned.
   syncable_prefs::PrefServiceSyncable* prefs_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeLauncherPrefsObserver);
 };
 
+}  // namespace launcher
 }  // namespace ash
 
 #endif  // CHROME_BROWSER_UI_ASH_CHROME_LAUNCHER_PREFS_H_