Revert of MacViews: Allow the toolkit-views Enterprise Signin Confirmation Dialog to be used

chrome/browser/ui/tab_dialogs.h

 // Copyright 2014 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_TAB_DIALOGS_H_
 #define CHROME_BROWSER_UI_TAB_DIALOGS_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 41 matching lines @@
   // Shows or hides the hung renderer dialog.
   virtual void ShowHungRendererDialog(
       const content::WebContentsUnresponsiveState& unresponsive_state) = 0;
   virtual void HideHungRendererDialog() = 0;
 
   // Shows a dialog asking the user to confirm linking to a managed account.
   virtual void ShowProfileSigninConfirmation(
       Browser* browser,
       Profile* profile,
       const std::string& username,
-      std::unique_ptr<ui::ProfileSigninConfirmationDelegate> delegate) = 0;
+      ui::ProfileSigninConfirmationDelegate* delegate) = 0;
 
   // Shows or hides the ManagePasswords bubble.
   // Pass true for |user_action| if this is a user initiated action.
   virtual void ShowManagePasswordsBubble(bool user_action) = 0;
   virtual void HideManagePasswordsBubble() = 0;
 
   virtual base::WeakPtr<ValidationMessageBubble> ShowValidationMessage(
       const gfx::Rect& anchor_in_root_view,
       const base::string16& main_text,
       const base::string16& sub_text) = 0;
 
  protected:
   static const void* UserDataKey();
 };
 
 #endif  // CHROME_BROWSER_UI_TAB_DIALOGS_H_