Switch SupportsUserData uses to use unique_ptr.

chrome/browser/ui/browser_instant_controller.cc

 // Copyright 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/browser_instant_controller.h"
 
 #include "base/bind.h"
 #include "base/metrics/user_metrics.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 21 matching lines @@
 
 // Helpers --------------------------------------------------------------------
 
 namespace {
 
 // Helper class for posting a task to reload a tab, to avoid doing a re-entrant
 // navigation, since it can be called when starting a navigation. This class
 // makes sure to only execute the reload if the WebContents still exists.
 class TabReloader : public content::WebContentsUserData<TabReloader> {
  public:
+  ~TabReloader() override {}
+
   static void Reload(content::WebContents* web_contents) {
     TabReloader::CreateForWebContents(web_contents);
   }
 
  private:
   friend class content::WebContentsUserData<TabReloader>;
 
   explicit TabReloader(content::WebContents* web_contents)
       : web_contents_(web_contents), weak_ptr_factory_(this) {
     content::BrowserThread::PostTask(
         content::BrowserThread::UI, FROM_HERE,
         base::BindOnce(&TabReloader::ReloadImpl,
                        weak_ptr_factory_.GetWeakPtr()));
   }
-  ~TabReloader() override {}
 
   void ReloadImpl() {
     web_contents_->GetController().Reload(content::ReloadType::NORMAL, false);
 
     // As the reload was not triggered by the user we don't want to close any
     // infobars. We have to tell the InfoBarService after the reload,
     // otherwise it would ignore this call when
     // WebContentsObserver::DidStartNavigationToPendingEntry is invoked.
     InfoBarService::FromWebContents(web_contents_)->set_ignore_next_reload();
 
@@ skipping 128 matching lines @@
       params.referrer = content::Referrer();
       params.transition_type = ui::PAGE_TRANSITION_RELOAD;
       contents->GetController().LoadURLWithParams(params);
     } else {
       // Reload the contents to ensure that it gets assigned to a
       // non-privileged renderer.
       TabReloader::Reload(contents);
     }
   }
 }