Revert of Revert "Revert of [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 924034374e400bad3efe44226db1a8a1b788efd5..ff98f0817f2f2b6985e4f4e2ce18dc30c188a7f8 100644
--- a/src/preparser.cc
+++ b/src/preparser.cc
@@ -1040,12 +1040,9 @@
   if (tok == Token::CATCH) {
     Consume(Token::CATCH);
     Expect(Token::LPAREN, CHECK_OK);
-    ExpressionClassifier pattern_classifier;
-    ParsePrimaryExpression(&pattern_classifier, CHECK_OK);
-    ValidateBindingPattern(&pattern_classifier, CHECK_OK);
+    ParseIdentifier(kDontAllowRestrictedIdentifiers, 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);