Migrate ArcUserDataService into ArcAuthService.

chrome/browser/chromeos/arc/arc_auth_service.h

Index: chrome/browser/chromeos/arc/arc_auth_service.h
diff --git a/chrome/browser/chromeos/arc/arc_auth_service.h b/chrome/browser/chromeos/arc/arc_auth_service.h
index 3466f886ad1a252bc28ddfc88d673d6b26ed6c4e..fc93fea98c0916ad67d4ccab16d05f6e39904ffc 100644
--- a/chrome/browser/chromeos/arc/arc_auth_service.h
+++ b/chrome/browser/chromeos/arc/arc_auth_service.h
@@ -181,6 +181,15 @@ class ArcAuthService : public ArcService,
   // Stops ARC without changing ArcEnabled preference.
   void StopArc();
 
+  // StopArc(), then EnableArc(). Between them data clear may happens.
+  // This is a special method to support enterprise device lost case.
+  // This can be called only when ARC is running.
+  void ReenableArc();

[Luis Héctor Chávez, 2016/08/10 06:25:48]

i'm still not happy with this name. reenabling omplies it is currently not
enabled, but it is actually not the case since it can only be callef while it is
enable. Restart is a better name overall.

The |reenable_arc_| member is actually correct since it is checked while it is
stopped.

[hidehiko, 2016/08/10 17:26:06]

Per offline discussion, renamed to StopAndEnableArc().
Later, let's clean them up more.

+
+  // Removes the data if ARC is stopped. Otherwise, queue to remove the data
+  // on ARC is stopped.
+  void RemoveArcData();
+
   // Returns current page that has to be shown in OptIn UI.
   UIPage ui_page() const { return ui_page_; }
 
@@ -201,6 +210,7 @@ class ArcAuthService : public ArcService,
   void StartAndroidManagementClient();
   void CheckAndroidManagement(bool background_mode);
   void StartArcIfSignedIn();
+  void OnArcDataRemoved(bool success);
 
   // Unowned pointer. Keeps current profile.
   Profile* profile_ = nullptr;
@@ -219,6 +229,7 @@ class ArcAuthService : public ArcService,
   UIPage ui_page_ = UIPage::NO_PAGE;
   base::string16 ui_page_status_;
   bool clear_required_ = false;
+  bool reenable_arc_ = false;
   bool waiting_for_reply_ = false;
 
   std::unique_ptr<ArcAuthContext> context_;