Rename StopWatch to Stopwatch. Add new Stopwatch.start() and Stopwatch.reset().

frog/leg/scanner/parser_bench.dart

 // 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.
 
 /**
  * A benchmark for the Dart parser.
  */
 class ParserBench extends BaseParserBench {
   Token scanFileNamed(String filename) {
     Token token;
     getBytes(filename, (bytes) {
       Scanner scanner = makeScanner(bytes);
       try {
         token = scanner.tokenize();
       } catch (MalformedInputException e) {
         print("${filename}: ${e}");
       }
     });
     return token;
   }
 
   void timedParseAll(List<String> arguments) {
-    StopWatch timer = new StopWatch();
+    Stopwatch timer = new Stopwatch();
     timer.start();
     BenchListener listener = parseAll(arguments);
     timer.stop();
     print("Parsing (${listener.libraryTagCount} tags, "
           + "${listener.classCount} classes, "
           + "${listener.interfaceCount} interfaces, "
           + "${listener.aliasCount} typedefs, "
           + "${listener.topLevelMemberCount} top-level members) "
           + "took ${timer.elapsedInMs()}ms");
   }
@@ skipping 59 matching lines @@
   }
 
   void beginClass(Token token) {
     classCount++;
   }
 
   void beginFunctionTypeAlias(Token token) {
     aliasCount++;
   }
 }