Switch SupportsUserData uses to use unique_ptr.

components/history/content/browser/web_contents_top_sites_observer.cc

 // Copyright 2015 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 "components/history/content/browser/web_contents_top_sites_observer.h"
 
 #include "base/logging.h"
+#include "base/memory/ptr_util.h"
 #include "components/history/core/browser/top_sites.h"
 #include "content/public/browser/navigation_details.h"
 #include "content/public/browser/navigation_entry.h"
 
 DEFINE_WEB_CONTENTS_USER_DATA_KEY(history::WebContentsTopSitesObserver);
 
 namespace history {
 
 // static
 void WebContentsTopSitesObserver::CreateForWebContents(
     content::WebContents* web_contents,
     TopSites* top_sites) {
   DCHECK(web_contents);
   if (!FromWebContents(web_contents)) {
-    web_contents->SetUserData(UserDataKey(), new WebContentsTopSitesObserver(
-                                                 web_contents, top_sites));
+    web_contents->SetUserData(UserDataKey(),
+                              base::WrapUnique(new WebContentsTopSitesObserver(
+                                  web_contents, top_sites)));
   }
 }
 
 WebContentsTopSitesObserver::WebContentsTopSitesObserver(
     content::WebContents* web_contents,
     TopSites* top_sites)
     : content::WebContentsObserver(web_contents), top_sites_(top_sites) {
 }
 
 WebContentsTopSitesObserver::~WebContentsTopSitesObserver() {
 }
 
 void WebContentsTopSitesObserver::NavigationEntryCommitted(
     const content::LoadCommittedDetails& load_details) {
   DCHECK(load_details.entry);
   if (top_sites_)
     top_sites_->OnNavigationCommitted(load_details.entry->GetURL());
 }
 
 }  // namespace history