Remember metadata positions for mixin and function typedefs.

runtime/vm/parser.h

Index: runtime/vm/parser.h
diff --git a/runtime/vm/parser.h b/runtime/vm/parser.h
index e7161a5ead8664aee9e8b8f58da135c9ac072722..4164b3371b08b224f30a63f4450d681029e8efb8 100644
--- a/runtime/vm/parser.h
+++ b/runtime/vm/parser.h
@@ -337,8 +337,10 @@ class Parser : public ValueObject {
   void ParseClassDeclaration(const GrowableObjectArray& pending_classes,
                              intptr_t metadata_pos);
   void ParseClassDefinition(const Class& cls);
-  void ParseMixinTypedef(const GrowableObjectArray& pending_classes);
-  void ParseTypedef(const GrowableObjectArray& pending_classes);
+  void ParseMixinTypedef(const GrowableObjectArray& pending_classes,
+                         intptr_t metadata_pos);
+  void ParseTypedef(const GrowableObjectArray& pending_classes,
+                    intptr_t metadata_pos);
   void ParseTopLevelVariable(TopLevel* top_level, intptr_t metadata_pos);
   void ParseTopLevelFunction(TopLevel* top_level, intptr_t metadata_pos);
   void ParseTopLevelAccessor(TopLevel* top_level, intptr_t metadata_pos);