Minor cleanup based on profiler output of CompileParseFunction.

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 832 matching lines @@
 
   RawInstance* TryCanonicalize(const Instance& instance,
                                TokenPosition token_pos);
   void CacheConstantValue(TokenPosition token_pos, const Instance& value);
   bool GetCachedConstant(TokenPosition token_pos, Instance* value);
 
   Thread* thread() const { return thread_; }
   Isolate* isolate() const { return isolate_; }
   Zone* zone() const { return thread_->zone(); }
 
+  Thread* thread_;  // Cached current thread.
   Isolate* isolate_;  // Cached current isolate.
-  Thread* thread_;
 
   Script& script_;
   TokenStream::Iterator tokens_iterator_;
   Token::Kind token_kind_;  // Cached token kind for current token.
   TokenPosition prev_token_pos_;
   Block* current_block_;
 
   // is_top_level_ is true if parsing the "top level" of a compilation unit,
   // that is class definitions, function type aliases, global functions,
   // global variables.
@@ skipping 50 matching lines @@
 
   intptr_t recursion_counter_;
   friend class RecursionChecker;
 
   DISALLOW_COPY_AND_ASSIGN(Parser);
 };
 
 }  // namespace dart
 
 #endif  // VM_PARSER_H_