arc: kArcCompatibleFilesystemChosen pref to local state and integer.

chrome/browser/chromeos/arc/arc_session_manager.cc

Index: chrome/browser/chromeos/arc/arc_session_manager.cc
diff --git a/chrome/browser/chromeos/arc/arc_session_manager.cc b/chrome/browser/chromeos/arc/arc_session_manager.cc
index 37782a423fd506dec462993dee536f7d2bce96d8..5a99ca554f4232ac1b1702bccc976ed5a213a001 100644
--- a/chrome/browser/chromeos/arc/arc_session_manager.cc
+++ b/chrome/browser/chromeos/arc/arc_session_manager.cc
@@ -178,7 +178,12 @@ void ArcSessionManager::RegisterProfilePrefs(
   // AD-managed device.
   registry->RegisterStringPref(prefs::kArcActiveDirectoryPlayUserId,
                                std::string());
-  registry->RegisterBooleanPref(prefs::kArcCompatibleFilesystemChosen, false);
+}
+
+// static
+void ArcSessionManager::RegisterLocalStatePrefs(PrefRegistrySimple* registry) {
+  registry->RegisterIntegerPref(prefs::kArcCompatibleFilesystemChosen,
+                                kFileSystemIncompatible);

[xiyuan, 2017/04/13 16:35:59]

You don't need to do this for using known_user because it hosts the per-user
values under a kKnownUsers key and already registered with local state. [1]

[1]: 
https://cs.chromium.org/chromium/src/components/user_manager/known_user.cc?rc...

[kinaba, 2017/04/14 04:33:55]

Oh, I didn't know the way it works. Thanks, removed.

 }
 
 // static