Identity API: Pop-up a sign-in dialog if gaia credentials are bad

chrome/browser/extensions/api/identity/identity_signin_flow.h

+// Copyright 2013 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_EXTENSIONS_API_IDENTITY_IDENTITY_SIGNIN_FLOW_H_
+#define CHROME_BROWSER_EXTENSIONS_API_IDENTITY_IDENTITY_SIGNIN_FLOW_H_
+
+#include <string>
+
+#include "base/memory/scoped_ptr.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+
+class Profile;
+
+namespace extensions {
+
+// IdentitySigninFlow is a controller class to do a sign-in flow for an
+// interactive Identity API call. The UI is launched through the LoginUIService.
+// When the flow completes, the delegate is notified, and on success will
+// be given an OAuth2 login refresh token.
+class IdentitySigninFlow : public content::NotificationObserver {
+ public:
+  class Delegate {
+   public:
+    Delegate() {}
+    virtual ~Delegate() {}
+    // Called when the flow has completed successfully.
+    virtual void SigninSuccess(const std::string& token) = 0;
+    // Called when the flow has failed.
+    virtual void SigninFailed() = 0;
+
+    DISALLOW_COPY_AND_ASSIGN(Delegate);
+  };
+
+  IdentitySigninFlow(Delegate* delegate,
+                     Profile* profile);
+  virtual ~IdentitySigninFlow();
+
+  // Starts the flow. Should only be called once.
+  void Start();
+
+  // content::NotificationObserver implementation.
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE;
+
+ private:
+  Delegate* delegate_;
+  Profile* profile_;
+  // Used to listen to notifications from the TokenService.
+  content::NotificationRegistrar registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(IdentitySigninFlow);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_API_IDENTITY_IDENTITY_SIGNIN_FLOW_H_