[destructuring] Implement parameter pattern matching.

src/preparser.h

Index: src/preparser.h
diff --git a/src/preparser.h b/src/preparser.h
index 41ebf97280fbcae62ddc36e86149a1a25aa1f9c8..5c6a91eccc0e2c95b4e73974c5e57cb1209d00ae 100644
--- a/src/preparser.h
+++ b/src/preparser.h
@@ -1516,6 +1516,9 @@ class PreParserTraits {
     return PreParserExpressionList();
   }
 
+  static void AddParameterInitializationBlock(PreParserStatementList list,
+                                              bool* ok) {}
+
   V8_INLINE void SkipLazyFunctionBody(int* materialized_literal_count,
                                       int* expected_property_count, bool* ok) {
     UNREACHABLE();
@@ -3631,6 +3634,7 @@ ParserBase<Traits>::ParseArrowFunctionLiteral(
           ParseAssignmentExpression(true, &classifier, CHECK_OK);
       ValidateExpression(&classifier, CHECK_OK);
       body = this->NewStatementList(1, zone());
+      this->AddParameterInitializationBlock(body, CHECK_OK);
       body->Add(factory()->NewReturnStatement(expression, pos), zone());
       materialized_literal_count = function_state.materialized_literal_count();
       expected_property_count = function_state.expected_property_count();