Correctly recover from incorrect imports, etc.

pkg/front_end/lib/src/fasta/parser/class_member_parser.dart

Index: pkg/front_end/lib/src/fasta/parser/class_member_parser.dart
diff --git a/pkg/front_end/lib/src/fasta/parser/class_member_parser.dart b/pkg/front_end/lib/src/fasta/parser/class_member_parser.dart
index b4d5f6a8a05881023ab7c861bd15b0a1ad308c70..7901df0542023217c4decdcfa35516a3c6428b07 100644
--- a/pkg/front_end/lib/src/fasta/parser/class_member_parser.dart
+++ b/pkg/front_end/lib/src/fasta/parser/class_member_parser.dart
@@ -18,6 +18,13 @@ class ClassMemberParser extends Parser {
 
   Token parseExpression(Token token) => skipExpression(token);
 
+  Token parseRecoverExpression(Token token) {
+    Token begin = token;
+    token = skipExpression(token);
+    listener.handleRecoverExpression(begin);
+    return token;
+  }
+
   // This method is overridden for two reasons:
   // 1. Avoid generating events for arguments.
   // 2. Avoid calling skip expression for each argument (which doesn't work).