Revert of Use the same browser instance in the sync confirmation dialog.

chrome/browser/ui/webui/signin/signin_utils.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_WEBUI_SIGNIN_SIGNIN_UTILS_H_
 #define CHROME_BROWSER_UI_WEBUI_SIGNIN_SIGNIN_UTILS_H_
 
 #include <string>
 
 #include "base/values.h"
@@ skipping 16 matching lines @@
 content::WebContents* GetAuthFrameWebContents(
     content::WebContents* web_contents,
     const std::string& parent_frame_name);
 
 // Gets the browser containing the web UI; if none is found, returns the last
 // active browser for web UI's profile.
 Browser* GetDesktopBrowser(content::WebUI* web_ui);
 
 // Sets the height of the WebUI modal dialog after its initialization. This is
 // needed to better accomodate different locales' text heights.
-void SetInitializedModalHeight(Browser* browser,
-                               content::WebUI* web_ui,
+void SetInitializedModalHeight(content::WebUI* web_ui,
                                const base::ListValue* args);
 
 // Return true if force signin is enabled by group policy.
 bool IsForceSigninEnabled();
 
 }  // namespace signin
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SIGNIN_SIGNIN_UTILS_H_