Bug 1726123 - Part 5: Add missing "js/" includes outside of SM. r=arai

In preparation for the next part, add missing includes to "js/" public headers.

Differential Revision: https://phabricator.services.mozilla.com/D122843

dom/script/ScriptLoadHandler.cpp

@@ -10,6 +10,7 @@
 #include <utility>
 #include "ScriptLoader.h"
 #include "ScriptTrace.h"
+#include "js/Transcoding.h"
 #include "mozilla/Assertions.h"
 #include "mozilla/CheckedInt.h"
 #include "mozilla/DebugOnly.h"