Reland "Use the same browser instance in the sync confirmation dialog.

chrome/browser/ui/cocoa/profiles/signin_view_controller_delegate_mac.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_UI_COCOA_PROFILES_SIGNIN_VIEW_CONTROLLER_DELEGATE_MAC_H_
 #define CHROME_BROWSER_UI_COCOA_PROFILES_SIGNIN_VIEW_CONTROLLER_DELEGATE_MAC_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/scoped_nsobject.h"
@@ skipping 28 matching lines @@
   // Creates the web view that contains the signin flow in |mode| using
   // |profile| as the web content's profile, then sets |delegate| as the created
   // web content's delegate.
   static std::unique_ptr<content::WebContents> CreateGaiaWebContents(
       content::WebContentsDelegate* delegate,
       profiles::BubbleViewMode mode,
       Profile* profile,
       signin_metrics::AccessPoint access_point);
 
   static std::unique_ptr<content::WebContents>
-  CreateSyncConfirmationWebContents(Profile* profile);
+  CreateSyncConfirmationWebContents(Browser* browser);
 
   static std::unique_ptr<content::WebContents> CreateSigninErrorWebContents(
       Profile* profile);
 
  private:
   friend SigninViewControllerDelegate;
 
   // Creates and displays a constrained window containing |web_contents|. If
   // |wait_for_size| is true, the delegate will wait for ResizeNativeView() to
   // be called by the base class before displaying the constrained window.
@@ skipping 30 matching lines @@
 
   // The dialog modal presentation type.
   ui::ModalType dialog_modal_type_;
 
   NSRect window_frame_;
 
   DISALLOW_COPY_AND_ASSIGN(SigninViewControllerDelegateMac);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_PROFILES_SIGNIN_VIEW_CONTROLLER_DELEGATE_MAC_H_