Update SupportsUserData uses with unique_ptr.

chrome/browser/sync/sessions/sync_sessions_router_tab_helper.cc

 // Copyright 2017 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/sync/sessions/sync_sessions_router_tab_helper.h"
 
+#include "base/memory/ptr_util.h"
 #include "chrome/browser/sessions/session_tab_helper.h"
 #include "chrome/browser/sync/sessions/sync_sessions_web_contents_router.h"
 #include "components/sync_sessions/synced_tab_delegate.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/navigation_handle.h"
 #include "content/public/browser/render_frame_host.h"
 
 DEFINE_WEB_CONTENTS_USER_DATA_KEY(sync_sessions::SyncSessionsRouterTabHelper);
 
 namespace sync_sessions {
 
 // static
 void SyncSessionsRouterTabHelper::CreateForWebContents(
     content::WebContents* web_contents,
     SyncSessionsWebContentsRouter* router) {
   DCHECK(web_contents);
   if (!FromWebContents(web_contents)) {
-    web_contents->SetUserData(
-        UserDataKey(), new SyncSessionsRouterTabHelper(web_contents, router));
+    web_contents->SetUserData(UserDataKey(),
+                              base::WrapUnique(new SyncSessionsRouterTabHelper(
+                                  web_contents, router)));
   }
 }
 
 SyncSessionsRouterTabHelper::SyncSessionsRouterTabHelper(
     content::WebContents* web_contents,
     SyncSessionsWebContentsRouter* router)
     : content::WebContentsObserver(web_contents),
       router_(router),
       source_tab_id_(kInvalidTabID) {}
 
@@ skipping 37 matching lines @@
   }
   NotifyRouter();
 }
 
 void SyncSessionsRouterTabHelper::NotifyRouter(bool page_load_completed) {
   if (router_)
     router_->NotifyTabModified(web_contents(), page_load_completed);
 }
 
 }  // namespace sync_sessions