Make header include guards great again

runtime/vm/ast_printer.h

 // Copyright (c) 2011, 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_AST_PRINTER_H_
-#define VM_AST_PRINTER_H_
+#ifndef RUNTIME_VM_AST_PRINTER_H_
+#define RUNTIME_VM_AST_PRINTER_H_
 
 #include "vm/ast.h"
 #include "vm/growable_array.h"
 
 namespace dart {
 
 // Forward declaration.
 class ParsedFunction;
 class Log;
 
@@ skipping 28 matching lines @@
   void VisitGenericFieldNode(AstNode* node, const Field& field);
 
   intptr_t indent_;
   Log* logger_;
 
   DISALLOW_COPY_AND_ASSIGN(AstPrinter);
 };
 
 }  // namespace dart
 
-#endif  // VM_AST_PRINTER_H_
+#endif  // RUNTIME_VM_AST_PRINTER_H_