Re-re-land "[es6] Implement destructuring binding in try/catch"

src/preparser.cc

Index: src/preparser.cc
diff --git a/src/preparser.cc b/src/preparser.cc
index a12bf14e5860f50b8f4e0cf2a22f778aa1c99d95..4b86d78597d3c791d0bbdd7fcebbab38b69acf17 100644
--- a/src/preparser.cc
+++ b/src/preparser.cc
@@ -1039,9 +1039,12 @@ PreParser::Statement PreParser::ParseTryStatement(bool* ok) {
   if (tok == Token::CATCH) {
     Consume(Token::CATCH);
     Expect(Token::LPAREN, CHECK_OK);
-    ParseIdentifier(kDontAllowRestrictedIdentifiers, CHECK_OK);
+    ExpressionClassifier pattern_classifier;
+    ParsePrimaryExpression(&pattern_classifier, CHECK_OK);
+    ValidateBindingPattern(&pattern_classifier, CHECK_OK);
     Expect(Token::RPAREN, CHECK_OK);
     {
+      // TODO(adamk): Make this CATCH_SCOPE
       Scope* with_scope = NewScope(scope_, WITH_SCOPE);
       BlockState block_state(&scope_, with_scope);
       ParseBlock(CHECK_OK);