Parser: delay throwing errors.

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index 4f872a6e0d257429b0088454179ccc452bc315c3..10be1707ea7d03e95bbb6f1c1b2fc954c6bb2ea5 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -781,6 +781,8 @@ class Parser : public ParserBase<ParserTraits> {
                                                bool is_generator,
                                                bool* ok);
 
+  void ThrowPendingError();
+
   Isolate* isolate_;
 
   Handle<Script> script_;
@@ -792,6 +794,14 @@ class Parser : public ParserBase<ParserTraits> {
   CachedDataMode cached_data_mode_;
 
   CompilationInfo* info_;
+
+  // Pending errors.
+  bool has_pending_error_;
+  Scanner::Location pending_error_location_;
+  const char* pending_error_message_;
+  MaybeHandle<String> pending_error_arg_;
+  const char* pending_error_char_arg_;
+  bool pending_error_is_reference_error_;
 };