Switch SupportsUserData uses to use unique_ptr.

chrome/browser/safe_browsing/safe_browsing_navigation_observer.cc

Index: chrome/browser/safe_browsing/safe_browsing_navigation_observer.cc
diff --git a/chrome/browser/safe_browsing/safe_browsing_navigation_observer.cc b/chrome/browser/safe_browsing/safe_browsing_navigation_observer.cc
index dc296f1574d22d4afec82ab106e0d626b23654a4..d625c3430698a0868546d24325e9c9654089ddda 100644
--- a/chrome/browser/safe_browsing/safe_browsing_navigation_observer.cc
+++ b/chrome/browser/safe_browsing/safe_browsing_navigation_observer.cc
@@ -79,10 +79,9 @@ void SafeBrowsingNavigationObserver::MaybeCreateForWebContents(
         Profile::FromBrowserContext(web_contents->GetBrowserContext()))) {
     web_contents->SetUserData(
         kWebContentsUserDataKey,
-        new SafeBrowsingNavigationObserver(
-            web_contents,
-            g_browser_process->safe_browsing_service()
-                ->navigation_observer_manager()));
+        base::MakeUnique<SafeBrowsingNavigationObserver>(
+            web_contents, g_browser_process->safe_browsing_service()
+                              ->navigation_observer_manager()));
   }
 }