Issue #1691 - Part 8: Fix --enable-debug builds and continue dynamic module import changes. https://bugzilla.mozilla.org/show_bug.cgi?id=1342012 Support import from timeout handlers by associating the initiating script with the compiled JSScript. Fix error message that covers all import() failures that don't throw a JS exception. https://bugzilla.mozilla.org/show_bug.cgi?id=1331662 Partial - Replace nsJSUtils::EvaluateString calls by ExecutionContext scopes. Left EvaluateString() in nsXBLProtoImplField.cpp until ExecutionContext errors can be fixed.

(cherry picked from commit 22fcfc77971a9bb204df664c474681f4dcf54211)

dom/base/nsJSUtils.h

@@ -90,6 +90,9 @@ public:
     // Should the result be serialized before being returned.
     bool mCoerceToString;
 
+    // Encode the bytecode before it is being executed.
+    bool mEncodeBytecode;
+
 #ifdef DEBUG
     // Should we set the return value.
     bool mWantsReturnValue;