arc: Use incognito profile for OptIn and cookie fetcher

chrome/browser/chromeos/arc/arc_auth_ui.h

 // Copyright 2016 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_CHROMEOS_ARC_ARC_AUTH_UI_H_
 #define CHROME_BROWSER_CHROMEOS_ARC_ARC_AUTH_UI_H_
 
 #include "base/macros.h"
 #include "components/arc/auth/arc_auth_fetcher.h"
 #include "ui/web_dialogs/web_dialog_delegate.h"
 
 namespace content {
 class BrowserContext;
 }
 
 namespace views {
 class Widget;
 }
 
 namespace arc {
 
 // Shows ARC LSO web view that requires user input.
 class ArcAuthUI : public ui::WebDialogDelegate,
                   public ArcAuthFetcher::Delegate {
  public:
   class Delegate {
    public:
+    // Called when AuthCode was fetched.
+    virtual void OnAuthCodeFetchedFromUI(const std::string& auth_code) = 0;
     // Called when dialog is closed.
     virtual void OnAuthUIClosed() = 0;
 
    protected:
     virtual ~Delegate() = default;
   };
 
   ArcAuthUI(content::BrowserContext* browser_context, Delegate* delegate);
   ~ArcAuthUI() override;
 
@@ skipping 29 matching lines @@
   views::Widget* widget_;
 
   scoped_ptr<ArcAuthFetcher> auth_fetcher_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcAuthUI);
 };
 
 }  // namespace arc
 
 #endif  // CHROME_BROWSER_CHROMEOS_ARC_ARC_AUTH_UI_H_