Re-write many calls to WrapUnique() with MakeUnique()

chrome/browser/extensions/api/file_system/file_system_api.cc

Index: chrome/browser/extensions/api/file_system/file_system_api.cc
diff --git a/chrome/browser/extensions/api/file_system/file_system_api.cc b/chrome/browser/extensions/api/file_system/file_system_api.cc
index 63f80f2fbbfa9bac61692787a0ac1bc78fe9f7a6..b69ee6fc2ef2e839f7cc1afc45b363b77b3d17a2 100644
--- a/chrome/browser/extensions/api/file_system/file_system_api.cc
+++ b/chrome/browser/extensions/api/file_system/file_system_api.cc
@@ -320,10 +320,10 @@ void DispatchVolumeListChangeEvent(Profile* profile) {
       continue;
     event_router->DispatchEventToExtension(
         extension->id(),
-        base::WrapUnique(new Event(
+        base::MakeUnique<Event>(
             events::FILE_SYSTEM_ON_VOLUME_LIST_CHANGED,
             api::file_system::OnVolumeListChanged::kEventName,
-            api::file_system::OnVolumeListChanged::Create(event_args))));
+            api::file_system::OnVolumeListChanged::Create(event_args)));
   }
 }