Start moving signin code out of browser/sync.

chrome/browser/ui/webui/signin/signin_tracker.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_WEBUI_SIGNIN_SIGNIN_TRACKER_H_
+#define CHROME_BROWSER_UI_WEBUI_SIGNIN_SIGNIN_TRACKER_H_
+
+#include "chrome/browser/sync/profile_sync_service_observer.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+#include "content/public/browser/notification_types.h"
+
+class Profile;
+
+// This class listens to notifications from various services (SigninManager,
+// ProfileSyncService, etc) and coalesces them into notifications for the UI
+// layer.
+class SigninTracker : public ProfileSyncServiceObserver,
+                      public content::NotificationObserver {
+ public:
+  class Observer {
+   public:
+    // The GAIA credentials entered by the user have been validated.
+    virtual void GaiaCredentialsValid() = 0;
+
+    // The signin attempt failed. If this is called after GaiaCredentialsValid()
+    // then it means there was an error launching one of the dependent services.
+    virtual void SigninFailed() = 0;
+
+    // The signin attempt succeeded.
+    virtual void SigninSuccess() = 0;
+  };
+
+  // Creates a SigninTracker that tracks the signin status on the passed
+  // |profile|, and notifies the |observer| on status changes. |observer| must
+  // be non-null.
+  SigninTracker(Profile* profile, Observer* observer);
+  virtual ~SigninTracker();
+
+  // content::NotificationObserver implementation.
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE;
+
+  // ProfileSyncServiceObserver implementation.
+  virtual void OnStateChanged() OVERRIDE;
+
+  // Returns true if the various authenticated services are properly signed in
+  // (no auth errors, etc).
+  static bool AreServicesSignedIn(Profile* profile);
+
+ private:
+  // The various states the login process can be in.
+  enum LoginState {
+    WAITING_FOR_GAIA_VALIDATION,
+    SERVICES_INITIALIZING,
+    SIGNIN_COMPLETE
+  };
+
+  // The current state of the login process.
+  LoginState state_;
+
+  // The profile whose signin status we are tracking.
+  Profile* profile_;
+
+  // Observer we call when the signin state changes.
+  Observer* observer_;

[tim (not reviewing), 2012/02/14 17:22:29]

Brief comment that we require this to live beyond |this| (actually maybe add
that comment at the ctor).

[Andrew T Wilson (Slow), 2012/02/14 20:52:36]

Done.

+
+  // Set to true when SigninManager has validated our credentials.
+  bool credentials_valid_;
+
+  // Used to listen to notifications from the SigninManager.
+  content::NotificationRegistrar registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(SigninTracker);
+};
+
+#endif  // CHROME_BROWSER_UI_WEBUI_SIGNIN_SIGNIN_TRACKER_H_
+