Fix spurious resume when awaiting future in async* code

runtime/vm/parser.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_PARSER_H_
 #define VM_PARSER_H_
 
 #include "include/dart_api.h"
 
 #include "platform/assert.h"
@@ skipping 332 matching lines @@
   void SkipSymbolLiteral();
   void SkipNewOperator();
   void SkipActualParameters();
   void SkipMapLiteral();
   void SkipListLiteral();
   void SkipFunctionLiteral();
   void SkipStringLiteral();
   void SkipQualIdent();
   void SkipFunctionPreamble();
 
+  AstNode* DartPrint(const char* str);
+
   void CheckConstructorCallTypeArguments(intptr_t pos,
                                          const Function& constructor,
                                          const TypeArguments& type_arguments);
 
   // Report already formatted error.
   static void ReportError(const Error& error);
 
   // Concatenate and report an already formatted error and a new error message.
   static void ReportErrors(const Error& prev_error,
                            const Script& script, intptr_t token_pos,
@@ skipping 497 matching lines @@
 
   // Indentation of parser trace.
   intptr_t trace_indent_;
 
   DISALLOW_COPY_AND_ASSIGN(Parser);
 };
 
 }  // namespace dart
 
 #endif  // VM_PARSER_H_