Switch SupportsUserData uses to use unique_ptr.

chrome/browser/ui/webui/constrained_web_dialog_ui.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/ui/webui/constrained_web_dialog_ui.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 86 matching lines @@
   if (!args->empty() && !args->GetString(0, &json_retval))
     NOTREACHED() << "Could not read JSON argument";
   delegate->GetWebDialogDelegate()->OnDialogClosed(json_retval);
   delegate->OnDialogCloseFromWebUI();
 }
 
 // static
 void ConstrainedWebDialogUI::SetConstrainedDelegate(
     content::WebContents* web_contents,
     ConstrainedWebDialogDelegate* delegate) {
-  web_contents->SetUserData(&kConstrainedWebDialogDelegateUserDataKey,
-                            new ConstrainedWebDialogDelegateUserData(delegate));
+  web_contents->SetUserData(
+      &kConstrainedWebDialogDelegateUserDataKey,
+      base::MakeUnique<ConstrainedWebDialogDelegateUserData>(delegate));
 }
 
 // static
 void ConstrainedWebDialogUI::ClearConstrainedDelegate(
     content::WebContents* web_contents) {
   web_contents->RemoveUserData(&kConstrainedWebDialogDelegateUserDataKey);
 }
 
 ConstrainedWebDialogDelegate* ConstrainedWebDialogUI::GetConstrainedDelegate() {
   ConstrainedWebDialogDelegateUserData* user_data =
       static_cast<ConstrainedWebDialogDelegateUserData*>(
           web_ui()->GetWebContents()->
               GetUserData(&kConstrainedWebDialogDelegateUserDataKey));
 
   return user_data ? user_data->delegate() : NULL;
 }