Minor cleanup based on profiler output of CompileParseFunction.

runtime/vm/compiler_stats.cc

 // 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.
 
 #include "vm/compiler_stats.h"
 
 #include "vm/flags.h"
 #include "vm/log.h"
 #include "vm/object_graph.h"
 #include "vm/object_store.h"
@@ skipping 13 matching lines @@
       : obj_(Object::Handle()),
         stats_(compiler_stats) {
   }
 
   void VisitObject(RawObject* raw_obj) {
     if (raw_obj->IsFreeListElement()) {
       return;
     }
     obj_ = raw_obj;
     if (obj_.GetClassId() == TokenStream::kClassId) {
-      TokenStream::Iterator tkit(TokenStream::Cast(obj_),
+      TokenStream::Iterator tkit(Thread::Current()->zone(),
+                                 TokenStream::Cast(obj_),
                                  TokenPosition::kMinSource,
                                  TokenStream::Iterator::kNoNewlines);
       Token::Kind kind = tkit.CurrentTokenKind();
       while (kind != Token::kEOS) {
         ++stats_->num_tokens_total;
         tkit.Advance();
         kind = tkit.CurrentTokenKind();
       }
     }
   }
@@ skipping 263 matching lines @@
   log.Print("  VarDesc size:          %" Pd64 " KB\n", vardesc_size / 1024);
   log.Flush();
   char* stats_text = text;
   text = NULL;
   return stats_text;
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart