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

chrome/browser/ui/ash/chrome_launcher_prefs.h

Index: chrome/browser/ui/ash/chrome_launcher_prefs.h
diff --git a/chrome/browser/ui/ash/chrome_launcher_prefs.h b/chrome/browser/ui/ash/chrome_launcher_prefs.h
index 38786144c1cbfc804028d74452e0d42d3b2a26ad..6b957f3b1dc85070630e193264de4c9ab50e995d 100644
--- a/chrome/browser/ui/ash/chrome_launcher_prefs.h
+++ b/chrome/browser/ui/ash/chrome_launcher_prefs.h
@@ -12,6 +12,7 @@
 
 class LauncherControllerHelper;
 class PrefService;
+class Profile;
 
 namespace base {
 class DictionaryValue;
@@ -63,7 +64,19 @@ void SetShelfAlignmentPref(PrefService* prefs,
 // 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);

[stevenjb, 2016/06/10 18:00:41]

These functions should really all be in a separate namespace, e.g.
ash::launcher. 'ash' is very large and the context of 'SetPinPosition' is not
necessarily obvious.

[khmel, 2016/06/10 22:08:11]

Done.

 
 }  // namespace ash