Fix remaining warnings.

lib/compiler/implementation/scanner/scanner_bench.dart

 // 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.
 
 #library('scanner_bench');
 #import('scannerlib.dart');
 #import('scanner_implementation.dart');
 #source('source_list.dart');
 
 /**
@@ skipping 93 matching lines @@
     }
     ++ticks;
   }
 
   void end() {
     if (total > 10) {
       print("$up$clear[$hashes] 100% ${score()}");
     }
   }
 
-  void recordScore(num score) {
-    scores.addLast(score);
+  void recordScore(num newScore) {
+    scores.addLast(newScore);
   }
 
   int score() {
     num geoMean = 1;
     int count = Math.min(scores.length, GEOMEAN_COUNT);
     for (int i = scores.length - count; i < scores.length; i++) {
       geoMean *= scores[i];
     }
     geoMean = Math.pow(geoMean, 1/Math.max(count, 1));
     return geoMean.round().toInt();
@@ skipping 15 matching lines @@
 
   void end() {
   }
 
   void recordScore(num score) {
     if (total > 10) {
       print("$ticks, $score, ${ticks * 100 ~/ total}%");
     }
   }
 }