Extract ArcSupportMessageHost.

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 8f161ed6a8bd73e4bcbbd25bed609c36ca49f576..34e63d9f74eb422d52602d5799f7eed7fd1ebd09 100644
--- a/chrome/browser/chromeos/arc/arc_auth_service.h
+++ b/chrome/browser/chromeos/arc/arc_auth_service.h
@@ -36,6 +36,8 @@ namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
+class ArcSupportHost;
+
 namespace arc {
 
 class ArcAndroidManagementChecker;
@@ -80,12 +82,6 @@ class ArcAuthService : public ArcService,
     // Called whenever Opt-In state of the ARC has been changed.
     virtual void OnOptInChanged(State state) {}
 
-    // Called to notify that OptIn UI needs to be closed.
-    virtual void OnOptInUIClose() {}
-
-    // Called to notify that OptIn UI needs to show specific page.
-    virtual void OnOptInUIShowPage(UIPage page, const base::string16& status) {}
-
     // Called to notify that ARC bridge is shut down.
     virtual void OnShutdownBridge() {}
 
@@ -207,8 +203,11 @@ class ArcAuthService : public ArcService,
   // Returns current page status, relevant to the specific page.
   const base::string16& ui_page_status() const { return ui_page_status_; }
 
+  ArcSupportHost* support_host() { return support_host_.get(); }
+
  private:
   void StartArc();
+  // TODO: move UI methods/fields to ArcSupportHost.
   void ShowUI(UIPage page, const base::string16& status);
   void CloseUI();
   void SetUIPage(UIPage page, const base::string16& status);
@@ -248,6 +247,11 @@ class ArcAuthService : public ArcService,
   bool reenable_arc_ = false;
   base::OneShotTimer arc_sign_in_timer_;
 
+  // Temporarily keeps the ArcSupportHost instance.
+  // This should be moved to ArcSessionManager when the refactoring is
+  // done.
+  std::unique_ptr<ArcSupportHost> support_host_;
+
   std::unique_ptr<ArcAuthContext> context_;
   std::unique_ptr<ArcAuthCodeFetcher> auth_code_fetcher_;
   std::unique_ptr<ArcAndroidManagementChecker> android_management_checker_;