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 350dc6eb3d5371e573436e45c0cd1592f212d5b7..0fc190dbb0af77bfcb275a608d08bcb33e3d217d 100644
--- a/chrome/browser/extensions/api/file_system/file_system_api.cc
+++ b/chrome/browser/extensions/api/file_system/file_system_api.cc
@@ -319,10 +319,10 @@ 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)));
   }
 }