[debug] Don't notify listener of exceptions internal to a desugaring.

src/ast/ast.h

Index: src/ast/ast.h
diff --git a/src/ast/ast.h b/src/ast/ast.h
index 19e530c915912f5df9a28ca6581df7b6d8cc40d0..ad02c960f840d66ff44ecaa1d5d89fdb40bdc284 100644
--- a/src/ast/ast.h
+++ b/src/ast/ast.h
@@ -3166,6 +3166,16 @@ class AstNodeFactory final BASE_EMBEDDED {
                           HandlerTable::PROMISE, pos);
   }
 
+  TryCatchStatement* NewTryCatchStatementForDesugaring(Block* try_block,
+                                                       Scope* scope,
+                                                       Variable* variable,
+                                                       Block* catch_block,
+                                                       int pos) {
+    return new (local_zone_)
+        TryCatchStatement(local_zone_, try_block, scope, variable, catch_block,
+                          HandlerTable::DESUGARING, pos);
+  }
+
   TryFinallyStatement* NewTryFinallyStatement(Block* try_block,
                                               Block* finally_block, int pos) {
     return new (local_zone_)