Set up rewriting triggers

src/parsing/parser.h

Index: src/parsing/parser.h
diff --git a/src/parsing/parser.h b/src/parsing/parser.h
index f03efdc72297fc178de4c40dd1ec3b5eb96c4274..7d50221334d7e559ea760dd939da061da553bc52 100644
--- a/src/parsing/parser.h
+++ b/src/parsing/parser.h
@@ -649,6 +649,16 @@ class ParserTraits {
   void SetFunctionNameFromIdentifierRef(Expression* value,
                                         Expression* identifier);
 
+  // Rewrite expressions that are not used as patterns
+  V8_INLINE Expression* RewriteNonPattern(
+      Expression* expr, const ExpressionClassifier* classifier, bool* ok);
+  V8_INLINE ZoneList<Expression*>* RewriteNonPatternArguments(
+      ZoneList<Expression*>* args, const ExpressionClassifier* classifier,
+      bool* ok);
+  V8_INLINE ObjectLiteralProperty* RewriteNonPatternObjectLiteralProperty(
+      ObjectLiteralProperty* property, const ExpressionClassifier* classifier,
+      bool* ok);
+
  private:
   Parser* parser_;
 };
@@ -1003,6 +1013,15 @@ class Parser : public ParserBase<ParserTraits> {
 
   V8_INLINE void RewriteDestructuringAssignments();
 
+  V8_INLINE Expression* RewriteNonPattern(
+      Expression* expr, const ExpressionClassifier* classifier, bool* ok);
+  V8_INLINE ZoneList<Expression*>* RewriteNonPatternArguments(
+      ZoneList<Expression*>* args, const ExpressionClassifier* classifier,
+      bool* ok);
+  V8_INLINE ObjectLiteralProperty* RewriteNonPatternObjectLiteralProperty(
+      ObjectLiteralProperty* property, const ExpressionClassifier* classifier,
+      bool* ok);
+
   friend class InitializerRewriter;
   void RewriteParameterInitializer(Expression* expr, Scope* scope);