Implement await for statement

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 550 matching lines @@
   AstNode* LoadFieldIfUnresolved(AstNode* node);
   AstNode* LoadClosure(PrimaryNode* primary);
   AstNode* CallGetter(intptr_t token_pos, AstNode* object, const String& name);
 
   AstNode* ParseAssertStatement();
   AstNode* ParseJump(String* label_name);
   AstNode* ParseIfStatement(String* label_name);
   AstNode* ParseWhileStatement(String* label_name);
   AstNode* ParseDoWhileStatement(String* label_name);
   AstNode* ParseForStatement(String* label_name);
+  AstNode* ParseAwaitForStatement(String* label_name);
   AstNode* ParseForInStatement(intptr_t forin_pos, SourceLabel* label);
   RawClass* CheckCaseExpressions(const GrowableArray<LiteralNode*>& values);
   CaseNode* ParseCaseClause(LocalVariable* switch_expr_value,
                             GrowableArray<LiteralNode*>* case_expr_values,
                             SourceLabel* case_label);
   AstNode* ParseSwitchStatement(String* label_name);
 
   // try/catch/finally parsing.
   void AddCatchParamsToScope(CatchParamDesc* exception_param,
                              CatchParamDesc* stack_trace_param,
@@ skipping 232 matching lines @@
   bool unregister_pending_function_;
 
   LocalScope* async_temp_scope_;
 
   DISALLOW_COPY_AND_ASSIGN(Parser);
 };
 
 }  // namespace dart
 
 #endif  // VM_PARSER_H_