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

src/ast/ast.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_AST_AST_H_
 #define V8_AST_AST_H_
 
 #include "src/ast/ast-value-factory.h"
 #include "src/ast/modules.h"
 #include "src/ast/variables.h"
@@ skipping 3148 matching lines @@
   TryCatchStatement* NewTryCatchStatementForPromiseReject(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::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_)
         TryFinallyStatement(local_zone_, try_block, finally_block, pos);
   }
 
   DebuggerStatement* NewDebuggerStatement(int pos) {
     return new (local_zone_) DebuggerStatement(local_zone_, pos);
   }
 
@@ skipping 359 matching lines @@
                                     : NULL;                                   \
   }
 AST_NODE_LIST(DECLARE_NODE_FUNCTIONS)
 #undef DECLARE_NODE_FUNCTIONS
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_AST_AST_H_