More PcDescriptor cleanups.

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 709 matching lines @@
   // is defined. This can be the library in which the current_class_ is
   // defined, or the library of a mixin class where the function originates.
   Library& library_;
 
   // List of try blocks seen so far, this is used to generate inlined finally
   // code at all points in the try block where an exit from the block is
   // done using 'return', 'break' or 'continue' statements.
   TryBlocks* try_blocks_list_;
 
   // Each try in this function gets its own try index.
-  intptr_t AllocateTryIndex() { return last_used_try_index_++; }
-  intptr_t last_used_try_index_;
+  int16_t AllocateTryIndex();
+
+  int16_t last_used_try_index_;
 
   bool unregister_pending_function_;
 
   DISALLOW_COPY_AND_ASSIGN(Parser);
 };
 
 }  // namespace dart
 
 #endif  // VM_PARSER_H_